These are high quality, hand waxed rondelle shaped wood beads made from cheesewood. They are light weight and non-toxic making them great for jewelry and other crafts. They are natural so size will vary slightly but typically they are 8mm in diameter and 3-4mm thick with a 1.2-2mm hole. They come on a temporary strand that is about 15 1/2 inches long and has 100-110 beads on it.