Description Coin Glass Bead Mix – 10mm – 100 grams. Price per 100 gram pack.  Approx 160 pieces per 100 grams. Glass Beads. Approx Bead Size – 10 x 10 x 4mm.  Approx Hole Size – 1.5mm. Glass dust may accumulate when beads rub against each other.  This is surface dust and can easily be wiped away. Bulk Prices Available.