5 x 10mm. These are brass with 4 prongs. They came out of the famous bead hoard. Great vintage condition. Originally $12!
If you are not delighted with your beads and beading supplies, we will gladly give you a store credit, exchange, or a refund within 30 days purchase for all items except Closeouts & Custom Cut Chains. Please see our shipping & returns page for the full details.