This is a set of four acrylic rings. I have other accessories for sale as well. I'm also considering selling items together, so please feel free to ask. I haven't used them often, and they've been stored at home. I haven't measured the sizes exactly, but I was able to wear them comfortably on a finger that usually fits a size 11 ring perfectly, so I think they are size 11 or larger. Please feel free to comment.