Introducing the new marble cOllection! Each marble silicOne spOrt ID case has it's own unique pattern, so no two are exactly the same. It measures 4 ¾ by 2 ½ and features an opening to easily store and view your ID, and has an exterior pOcket perfect for credit cards and cash. Top quality silicOne is water repellent and non-toxic. Easily hOOks up with the Big O Key Ring or can stand alOne as your key ring.