Size: 7" average Materials: Flex Metal Gemstones: 8 mm Zebra Agate: encourages a sense of reality and pragmatic thinking. Zebra Agates with regular designs soothe those who desire peace and harmony, while those with irregular designs can stimulate action and important decision making. What is a Flex Bracelet: It is Stainless Steel Flex wire - kinda like the toy called Slinky was made from. It adjusts to all wrist sizes and you can bend it without breaking it. There is a hook on the back of the bracelet to secure it closed - see one of the pics.