They are great, but I wish they had a greater variety of sizes. My 1200g albino is about to grow out of the medium hide so I bought a few large ones. They are GIGANTIC. They pretty much take up the whole width of a 32 quart tub. It's so much bigger than the medium that she won't even use it because it is not snug enough for her. I guess I'll just let her wear her medium hide as a hat for a while longer.