Flat Round Eco-Friendly Handmade Polymer Clay Vinyl Beads Heishi Disks - according to the manufacturer. They are slightly rubbery, flexible - and are not off-gassing any significant scent. Lightweight, waterproof and comfy. Durable, fun colors, great for a happy fun creation!

6mm x 1mm Hole size is approx. 2mm. Approx. 380-400 on approx. 17.5 inch (44.45 cm) strand. (strand)