This crisp transparent Green mouth blown Murano Glass Bead is perfect for earrings or on necklaces. It is light weight with a size approximately 20mm. The shape is round with a hole size between 1.5 and 2.5mm. You will need to use endcaps on these to secure the headpins or your wire. As they are blown at about 840-900 Degrees Centigrade, it is impossible to control the exact hole size. Price Per Bead