Size 6. This is one simply stunning Autism awareness puzzle ring. It is genuine, high quality .925 sterling silver and very shiny. The band of this Autism Awareness puzzle ring is a little more than 1/4 of an inch wide. Can be worn as a men's or women's ring. The puzzle piece symbolizes the mystery and complexity of this developmental disability. There is no known single cause of Autism, yet approximately 1 in 150 American children are living with the effects of the Autism spectrum disorder. By spreading awareness and supporting reasearch, we can all help put together the pieces of this puzzle.