25x Silver-Plated Metal Wine Glass Charms 30mm. Easy to thread wine glass charm rings, measuring 30mm in diameter and with 0.8mm diameter wire. Because the wire bends at a right-angle at the closure point, you may need to use pliers to straighten this before adding the beads and then rebend to finish. Perfect for adding an individual touch at a dinner party or for wedding favours. Lead and nickel free.