Size of the bead: 4.00 mm Also available in size 3.00mm. Size of the full hole: 1.10 mm This means you can only use a chain or a string up to 1.00mm in thickness. Quantity: 100 pcs Please note that all the opal stones I sell are synthetic, lab created! This listing is for 100 opal beads only, and does not include any chain or necklace. The item "4MM Round Loose White LAB Opal Full Drilled Spacer Beads 100 pcs SALE Bulk LOT" is in sale since Tuesday, April 2, 2019.This item is in the category "Jewelry & Watches\Loose Beads\Stone". The seller is "gemazone" and is located in Tel Aviv, default. This item can be shipped worldwide.