Skull Beaded BraceletBlack Onyx Stone & Obsidian Stones. Natural Stones High Quality Bead Size 10mm Custom Made Note: Custom Orders Can Take 1 2 Weeks (Usually Sooner) PLEASE KEEP THIS IN MIND BEFORE PLACING YOUR ORDER. Sizing The easiest way to find out what size stone bracelet you need is to use a tape measure and measure you wrist. If you do not have a flexible tape measure, you can use a piece of paper and then use a ruler or any smart phone app to measure the piece