This dice dangle is iridescent novelty vinyl embroidered onto tough marine vinyl. It's a little over an inch across (right at 3cm), and comes with a ball chain to attach it to a backpack, keychain, or dice bag. The base colors of the icosahedrons are purple, turquoise blue, or fuchsia, but depending on the lighting you may see nothing but iridescent flash - look at the shots from my work table versus under the ring light.