These flat coin beads have a silver foil coin interior which ships through the lampwork glass bead. 26mm flat round. Hole: 1.7-2.2mm. With lampworked, silver-foil glass beads, every bead has a silver-lining - shimmering with possibilities. Gorgeous silver-foil and solid colour glass. Sizes, shapes and colours may vary with handcrafted items. Items are made with solid colour glass, which means the base colour of the glass is saturated throughout the object and will not fade or rub off over time.