I'm a size 32 I bought a 36 to give extra room and it still barely fits. I got it at the last notch and there's barely enough play to get it through the first belt loop on my jeans. The belt is listed as a size 36 and has a total length of 41 inches. So let's assume that sizing should be based on waist measurement and not belt length. It is too small and will never fit a person who is actually a size 36. It's closer to size 28/30.