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Guide to Seed Beads including History, Sizing, Shapes & Coatings

What Are Seed Beads?

Seed beads are small uniformly shaped beads that come in a myriad of shapes, sizes, colours and finishes. Aside from embroidery, they are most commonly used for loom and off-loom bead weaving techniques such as brick stitch and peyote stitch. They can also be used for beaded flower making, simple stringing, and as spacers between other beads in jewellery making.

Glass is the most common material used to make seed beads, but historically they have also been made from metal or ceramic. Most modern high quality seed beads are made in Japan or the Czech Republic. The Japanese beads are manufactured by Matsuno, the oldest of the three Japanese seed bead manufacturers, in Osaka, Toho in Hiroshima, and Miyuki in Fukuyama, Hiroshima. These Far Eastern manufacturers have a well deserved reputation for achieving greater uniformity and consistency of size, shape and finish over Preciosa, their main Czech Republic based competitor, but their pricing does reflect this. However, pricing aside, many bead workers still favour the Czech beads because they feel they have a cottage industry like charm to them as opposed to precision cut perfection. They are also more valued in bead embroidery as they have slightly larger holes than their Japanese counterparts, making multiple thread passes easier, whilst their softer edges give a more natural drape or flow to beaded garments and projects. The waters are always shifting but Preciosa also seems to provide a greater range of basic bead shapes and then adds variations to these bead shapes in the form of cuts, twists, super twists, spirals, bevels, and hole shape.

At the lower end of the market, cheap seed beads are made in India by Onam International, based in Varanasi, and in China by Ming Tree.

Big Bead Little Bead currently stocks Preciosa seed beads as well as some vintage seed beads mostly in sizes 10/0 or 10º and 11/0 or 11º. To buy seed beads click here

History Of Seed Beads

Historically, from the 15th century seed bead creation, development, and production was centred in the traditional European glass making centre of Murano in Italy, before finally reaching Bohemia, and then to a lesser extent in France and Germany. France was particularly noted for its faceted metal seed beads, prompting Miyuki to introduce their Delica seed beads in 1982 as a replacement for these antique French metal cylinder beads.

Italy pioneered the process of conterie or seed bead manufacture, with much of their output used as trade beads by European merchants when trading with American Indians, Africans, and the indigenous populations of the many other colonial centres around the world. For a little over two hundred years the bead makers of Murano had a virtual monopoly on this process until the Czechs entered the market place in the 18th century. (To learn more about the growth of Czech glass read our History of Czech Glass Bead Manufacture). The process was based around the technique of drawing out glass, whereby a mass of molten glass was literally drawn or pulled into a hollow cane tube. The molten glass was gathered on the end of a tool called a puntile, then a bubble was introduced in to the centre of the glass, after which a second puntile was attached, before the glass and bubble were drawn out into a long cane. The stretching could be achieved on a small scale by one person working alone, or on a larger scale by two people moving quickly but steadily in opposite directions for up to a hundred feet or more!

Seed Bead History

A section from an engraving showing glass being drawn. A plate from the Grands Hommes et Grands Faits de L’Industrie 1880

The drawn glass tube would then be cooled, rough cut into small bead pieces with a guillotine, before the pieces were placed in a hopper filled with a clay slurry mixture to smooth the beads through the abrasive action of tumbling. They would then be cleaned and re-worked before being fired for smoothness and depth of colour. The peak of seed bead production in Murano was in the early 1900s when these beads virtually sustained the Venetian glass industry, and you can read more on this subject in our History of Venetian Glass guide. Today seed bead manufacture is virtually non existent in Murano with production limited to a very few artisans.

It is said that the ability to manufacturer drawn beads was one of the most important developments in the history of beads. It was certainly the first time that beads could be produced en masse from tubes of glass, rather than the previous laborious practice of making individual beads. Further developments in the 1860s saw the introduction of several new processes and machines which enabled glass works to add uniformity of colour and sizing. Mass production was fully realised in the early 20th century with the arrival of a machine that could automatically draw the glass tubes achieving even greater consistency in size.

Moving on to the present day, if you were to visit one of the modern seed bead manufacturers today you would still get a sense of the historic processes involved in the production of seed beads. That is once you had seen past the high tech computerised machinery and manufacturing infrastructure! You would basically be in the centre of a 24 hour operation, where molten glass is moved from automatic furnaces to a melting pot, where upon compressed air is used to force the glass through a shaped hole in the pots base thereby determining the outline of the glass column, whilst also turning the centre of the column into a hollow tube. This cooling molten glass tube would then be moved across rollers and drawn out to the required cane thickness by machine, with the speed of draw determining the diameter of the glass tubes. The tubes would then be systematically cut into metre lengths. These tube lengths would then be cooled, quality controlled, and automatically cut into bead sized lengths. The resulting beads would then be reheated with carbon powder to provide smoothness, before before being washed and then reheated in a kiln to give a gloss finish. Additional treatments, where required, would then be applied and heat re-applied to set the colours and coatings. The process itself hasn’t changed . . . just the mechanics and level of labour involved.

Seed Bead Shapes & Styles

The principle seed beads produced in Europe by Preciosa, and the Far East by Matsuno, Miyuki, and Toho are listed below, along with vintage bead shapes that may be too labour intensive to produce today. Continuous innovation and attempts to out do the competition means this is an ever changing area of bead manufacture with new shapes, shape refinements, and coatings or finishes released with increasing regularity.


Seed Bead Types & Shapes
Type Description
Berry Beads Newly released by Miyuki this Berry bead is peanut shaped and is very similar to the Matsuno and Toho peanut bead, as well as the Preciosa Farfalle bead in all but name!
Bugle Beads A long, thin, tubular shaped bead, either twisted or straight, which can be plain, two cut or hex cut. We have a separate article about Bugle Beads in our Guides & Information section
Cylinder Beads Delica beads made by Mikuki, along with Treasures and Aiko made by Toho, are the highest quality seed beads in production today. They are made using state of the art machinery to give totally consistent shape and size. They have oversized holes, thin walls and are light weight, giving a beautifully uniform and detailed tile like finish to bead weaving and bead embroidery designs. Because of their lightness you also get more beads to the gram but their overall perfection means they are priced higher than comparably sized beads. Toho have also introduced hex cut cylinder beads. Mill Hill is an American company supplying their own brand cylinder beads, but the beads are actually manufactured by Toho. Preciosa also produce a delica and unica tube bead
Charlotte Beads Similar to a Rocaille but they have part of the surface of the bead ground or cut, to produce a facet for added shine. Charlotte is specifically a term for single faceted beads, but can also be used when 2 or 3 facets are added to the bead to add more sparkle. Charlottes with 2 or 3 cuts to the surface are also known as two cut and three cut beads respectively. Rocailles beads are most popular in size 13/0 or 13º but are available in sizes 8/0 to 15/0
Corolla Beads A Preciosa shape which has the appearance of a four petalled flower with a round central hole. Corollo also come in twisted lengths
Cube Beads Cube shaped beads come in three sizes. Those produced by Toho have the added benefit of a diamond shaped hole ensuring the beads sit correctly in a design
Delica Beads See Cylinder beads
Drop Beads These beads are drop shaped, come in four sizes, and have a hole in the centre of the bead. They are also known as Fringe beads
Farfalle Beads Double drop shaped beads named after the Italian word for butterfly, namely farfalla. Preciosa took the lead in their design and production with the Japanese introducing very similar bead designs, named as peanut and berry.
Fringe Beads See Drop beads
Hex Cut Beads or Hexagon Beads A six sided bead with regular facets
Macco Beads A super thin walled bead with a short bugle bead like shape
Macrame Beads Round beads specifically designed with larger holes to accommodate the thicker cords used in macrame
Magatama Beads Drop beads but with an offset hole giving them the appearance of curved beads. They are described by Toho as looking like a droplet of water. They are made by both Miyuki and Toho and are larger, wider and broader than standard drop beads. Longer Magatama beads resemble Czech glass dagger or spear beads save for the fact that the hole is cut on the slant so that the beads lean into each other in one direction when strung together
Oblong Beads This shape seems to be unique to Preciosa and is basically an elongated slightly flattened square or cube bead with a central round hole. They are also available with a bevelled hole edge
Peanut Beads Originally introduced by Matsuno but now also part of the Toho range this bead is peanut shaped and looks like two drop beads combined together. The Miyuki Berry seed bead is also very similar in shape as well as the Czech Farfalle bead which preceded both designs!
Rocaille Beads Pronounced roh kai these were historically round, silver-lined seed beads with square holes. Today the term simply refers to all round seed beads of the type that most people readily associate with seed beading. These modern beads normally have round holes, but Toho have recently re-introduced Rocailles with square holes to provide greater accuracy when placing them in designs
Spiral Beads A tubular bead which has been turned a stage further than a twist bead. Preciosa and Matsuno both manufacturer this shape of bead
Square Beads Are square or cube shaped with a relatively large hole meaning they can fit on a narrow leather cord if required. Preciosa squares have a diamond shaped hole for better placement. They also provide twisted squares
Star Beads A Preciosa shape which is similar in appearance to the Corolla but has six rounded petals forming a star shape with a round central hole. They also come in twisted lengths
Tila Beads A square flat bead with two holes running in parallel made by Miyuki
Three Cut Beads These beads with three random cuts creating a lot of reflective surface sparkle but with quite an irregular look to them
Triangle Beads Triangular shaped beads with triangular shaped holes ensuring the beads sit correctly in a design. Hole size also means they can be used on leather cord. Miyuki have introduced a new variant of the Japanese triangle bead which has sharper more defined points. Preciosa also manufactures twisted triangles
True Cut Beads A one cut bead in sizes other than 13/0 or 13º
Two Cut Beads These beads have two random cuts creating more reflective surface and therefore added shine and extra sparkle

Seed Bead Sizes

Regardless of country of manufacture seed beads do have a uniform guideline for sizing, though the origins of those guidelines have become clouded. There are two schools of thought:

1) The size of the bead is based on the size of the metal rods or mandrel used in forming the beads
2) The size refers to the number of seed beads that sit end to end in a row over an inch (2.5cm) in length. Meaning, for example that there should be 10 size 10/0 or 10º seed beads in an inch.

Both options are historically feasible but time has now made both options outdated. With seed bead production now a highly automated process the mandrel no longer has a place in the production process, and in terms of beads per inch this may well have held true when beads were hand-cut and an average was used. However, with todays modern manufacturing methods and machine cutting, there tends to be closer to 16 beads per inch at size 10/0 or 10º, and the other sizes are just as inaccurate. Measurements are now further complicated because seed bead sizes vary slightly between manufacturers, with Japanese beads tending to be slightly larger than Czech beads of the same given size. Add to this the fact that surface coatings and finishes also increase the physical size of a bead and the whole process seems ripe for a new universal standard of measurement!

Seed beads are classified with a number that relates to their size, and whilst there is doubt as to their actual size the most important thing to remember is that the smaller the bead number the larger the bead. The most common size is an 11/0 (approximately 1.8mm to 2.2mm wide depending on manufacturer), but seed beads can range from a size 3/0 to a very tiny grain of sand like size of 24/0. The 0 here is pronounced aught. This number is based on the fact that, historically, bead manufacturers used to refer to the standard sized beads that they made in the largest quantities as size 0 or null. Smaller size beads such as a 10/0 were therefore beads that were 10 times smaller than the size 0 or null bead. So for example size 14/0 is smaller than 11/0. Aughts are denoted by a slash and a zero, or a degree mark, so size 11 is written 11/0 or 11º.

Seed Bead Size Conversion

Due to the differing manufacturing processes, coatings and finishes employed in seed bead production in the Czech Republic and Japan, as explained above, these measurements can only ever be an approximation.


Seed Bead Size Conversion
Aught Size Millimetre Size Beads Per Inch Additional Notes
Seed Beads 6/0 or 6º 3.3 mm 10
Seed Beads 7/0 or 7º 2.9 mm
Seed Beads 8/0 or 8º 2.5 mm 13
Seed Beads 9/0 or 9º 2.2 mm 15
Seed Beads 10/0 or 10º 2.0 mm 16
Seed Beads 11/0 or 11º 1.8 mm 19 Miyuki Delicas, typically used for off-loom weaving, peyote stitch, brick stitch, square stitch and African helix, tend to come up smaller at 1.6mm
Seed Beads 12/0 or 12º 1.7 mm 20 Including Miyuki Delica and Toho Treasure or Aiko 11/0 or 11º
Seed Beads 13/0 or 13º 1.5 mm 27
Seed Beads 14/0 or 14º 1.4 mm 24
Seed Beads 15/0 or 15º 1.3 mm 25
Seed Beads 16/0 or 16º 1.2 mm Special Order or Vintage Seed Beads Only
Seed Beads 18/0 or 18º 1.1 mm Special Order or Vintage Seed Beads Only
Seed Beads 20/0 or 20º 1.0 mm Special Order or Vintage Seed Beads Only
Seed Beads 22/0 or 22º 0.9 mm Special Order or Vintage Seed Beads Only

Seed Bead Coatings & Finishes

The table below presents the more common coatings and finishes from the four main seed bead producers. As is the case with bead shapes and shape refinements, the coatings and finishes that are applied to beads are another area where continuous innovation and attempts to out do the competition come into play. New coatings and finishes are released with increasing regularity.

As with any applied coatings and finishes there is the possibility of fading through long exposure to sun light, or wear through day to day use. However this is now far more likely with cheap Indian seed beads and Chinese seed beads than with the four main seed bead manufacturers. They have all added a final firing stage into their process to ensure their coatings and finishes are as durable as they can be. As has been the case throughout history the formulas and processes used in glass production remain a closely guarded secret.


Seed Bead Finishes
Finish Description
Alabaster Seed Bead A dense translucent milky white or tinted finish
Aurora Borealis Seed Bead or AB An iridescent rainbow effect finish applied to the surface of the seed beads. Usually applied to one side of a bead but it can be used over the entire surface.
Ceylon Seed Bead A pearl lustre surface finish or inside colouring of opaque beads
Dyed Seed Bead A seed bead that has been surface dyed to a secondary colour. The colouring is on the surface and therefore can rub off over time
Galvanised Seed Bead A coloured surface coating or plating with a metal appearance. Techniques have improved but there is potential for this surface coating to rub off
Black Lined Seed Bead A black coating applied to the inside wall of a transparent or coloured seed bead adding depth of colour
Brass Lined Seed Bead A brass like coating which reflects a brass light when applied to the inside wall of a transparent or coloured seed bead
Bronze Lined Seed Bead A bronze like coating which reflects a brown light when applied to the inside wall of a transparent or coloured seed bead
Copper Lined Seed Bead A copper like coating which reflects a reddish light when applied to the inside wall of a transparent or coloured seed bead
Silver Lined Seed Bead A silver like coating which reflects light when applied to the inside wall of a transparent or coloured seed beads
Frost Seed Bead Matte frosted beads typically in bronze, gold or rainbow finishes
Iris Seed Bead An amazing iridescent coating when applied to dark opaque seed beads. Typically a rainbow based around purple
Lustre Seed Bead A transparent bead with a subtle pearl, silver, or gold surface finish producing a soft reflected light
Marbled Seed Bead A recent Toho seed beads innovation taking an opaque bead and giving it a marbled surface coating. Also available as gilded marble with a surface coating of uneven gilding over the marbled surface
Matte Seed Bead The seed beads are etched at a microscopic level producing a dull finish that does not reflect light
Metallic Seed Bead A shiny, vibrant metal surface coating or plating over an opaque or transparent base giving the appearance of metal, typically bronze or gunmetal
Opal Seed Bead A translucent seed bead lined with silver or gold
Opaque Seed Bead Seed beads that are solid in colour and therefore not transparent
Pearl Seed Bead An opaque seed bead given a pearlised surface coating
Rainbow Seed Bead An iridescent coating on the outside of either an opaque or transparent bead
Satin Seed Bead Seed beads made from translucent low lustre glass
Stripe Seed Bead Seed beads made with two or more glass colours
Translucent Seed Bead Glass seed beads that allow diffused light to pass through them
Transparent Seed Bead Glass seed beads that are see through even when coloured. With lighter colours these beads look almost clear

Buying Seed Beads in Hanks or Grams

Seed beads are sold either by the hank or by weight in grams. If you buy Czech seed beads, or vintage European seed beads, they would normally come in hanks with a label denoting their country of origin and the manufacturer.

What Are Czech Seed Beads

A 10” hank of vintage Czechoslovakian cobalt blue seed beads size 16/0 or 16º from the 1920s

Each hank contains approximately 12 strands of 20 inches. The length and number of strands may wary from the different sized beads though. However, as a service to their customers (as well watching their margins!) many wholesalers repackage the hanks into smaller tubes of beads and sell them in grams. This is ideal for those using smaller quantities of beads across a range of colours but a hank proves more economical when a larger quantity of beads is required. On the other side of the world contemporary Japanese seed beads are sold per gram weight, but vintage Japanese seed beads will be still found in hanks.

Seed Beads Per Hank or Gram

This table assumes a hank is 12 individual loops grouped together with each loop measuring 20 inches. Rocaille seed beads have been used.


Seed Beads Per Hank or Gram
Seed Bead Size Approx. Beads Per Hank Seed Bead Size Approx. Beads Per Gram
Seed Beads 6/0 or 6º 2100 Seed Beads 6/0 or 6º 15
Seed Beads 7/0 or 7º Seed Beads 7/0 or 7º
Seed Beads 8/0 or 8º 2880 Seed Beads 8/0 or 8º 38
Seed Beads 9/0 or 9º 3156 Seed Beads 9/0 or 9º
Seed Beads 10/0 or 10º 3540 Seed Beads 10/0 or 10º
Seed Beads 11/0 or 11º 4080 Seed Beads 11/0 or 11º 110
Seed Beads 12/0 or 12º 4440 Seed Beads 12/0 or 12º 190 – Also 11/0 or 11º Delica, Treasure and Aiko
Seed Beads 13/0 or 13º 4980 Seed Beads 13/0 or 13º
Seed Beads 14/0 or 14º 5580 Seed Beads 14/0 or 14º 255
Seed Beads 15/0 or 15º 5300 Seed Beads 15/0 or 15º 290
Seed Beads 16/0 or 16º 6720 Seed Beads 16/0 or 16º 900
Seed Beads 18/0 or 18º Seed Beads 18/0 or 18º 910
Seed Beads 20/0 or 20º Seed Beads 20/0 or 20º 930
Seed Beads 22/0 or 22º Seed Beads 22/0 or 22º 950



Seed Bead Size Guide, Coatings & Finishes – Free Adobe PDF Download

Download this Free Guide to Seed Bead Sizes as a PDF

Seed Bead Manufacturer Websites:

  • Matsuno . . . A basic website providing information about the company, Matsuno seed beads shapes, sizes, colours and care
  • Miyuki . . . A professional website providing company history, detailing Miyuki seed beads via technical illustrations and images for each shape, size, colour, finish, and Delica. Free PDF sample cards, plus charts for number of beads per kilogram, and an interesting guide to their manufacturing processes.
  • Preciosa . . . A professional website detailing company history, providing in depth technical illustrations, images and measurements detailing every aspect of Preciosa seed beads – shapes, sizes, colours, and finishes. Free PDF downloads showing bead shapes and photographs, as well as a document comparing Preciosa seed bead standards for shape and size consistency, durability and diversity against those of the Japanese manufacturers.
  • Toho . . . A basic website providing details of new products and listing seed bead products by category and then through on screen sample cards

ADDITIONAL ARTICLE KEYWORDS & THEMES:

What Is A Seed Bead, Seed Beads For Sale

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