12mm round. These are from the same Italian company that made the other black glitter beads in our lucite collection. These work well with so many beads. Beautiful speckles of glitter sparkle within each bead.
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.