If it helps anyone, just thought I'd share: I have two different kinds of sleeves. First off, make sure you look for a knee compression SLEEVE, not a brace. Two different things: braces have padding and sometimes a hole in the knee area that helps to keep the kneecap and surrounding ligaments stable. The goal here isn't to keep our kneecaps stable, it's to apply compression that assists blood flow and reduces swelling. Secondly, I got one by Tommy Copper that I bought at Bed, Bath and Beyond. Tommy Copper's sleeve is thin, and made from nylon and spandex. Got another one by McDavid which is thicker and made from neoprene that I use for my non-op knee since it's been complaining lately. Both Tommy Copper and McDavid have websites so if you can't find them locally, you can order them. I had to buy XXL because I'm bottom-heavy and have fat knees but they come in all sizes. If you need a size larger than 23", they may not have them in the stores but they definitely have them online.