These Orca Agate bracelets are 8mm bead size, they are crystal beads with 7.5inch elastic bands. One size fits most for these bracelets and they are extremely popular and durable with a very high sell through in retail and e-commerce settings. Orca Agate is a stone said to exude peace and tranquility as well as power, making it a perfect stone for those in need of a self-confidence boost