This is a bracelet made with natural stones. It has been stored unused since purchase. High-quality natural stones are used extensively, and it is very durable. Adjustable from approximately 16cm to 20cm. It is an adjuster type. Please wrap the excess cord around the side when wearing. ◆Types of Natural Stones◆ Golden Obsidian Natural Color High Rank Lapis Lazuli Purple Aura Brazilian Crystal Since no metal parts are used, it can be used with peace of mind by those with allergies. Material: Natural Stone Color: Black Material: Wax cord (polyester) Color: Blue Material: Natural Stone