5mm. These are out of the original box, uncirculated vintage crystal bicone beads made in Czechoslovakia in the 1940's. A little glass cleaner will make these old goodies sparkle. Super price! Sold in full grosses - 144 crystals.
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 of purchase. Please see our shipping & returns page for the full details.