The xlg roe rings are made from glass and sterling silver. Like all poppi rings, they fit a wide range of finger sizes - somewhere between a 6 1/2 and an 8 1/2. It depends a lot on how dense your finger is and what is comfortable to you. The beads we use to make the xlg roe rings are larger than the beads in the roe rings. The xlg roe take up more of the finger - about 3/4" to 1". The xlg are pretty wild and fun, and although they are large, they are not so big that they overpower you.