Whoever invented this belt is gifted. It mainly comes in three lengths. Thin, medium and tall. I bought Wednesday. My waist size is between 36 and 38, but you can't buy 37. With this belt you don't have to worry about the size. It snaps into place when it fits into a groove on the back. There's a small lever that you push in to unlock and pull to disengage, then remove the strap. Wonderful ! Time will tell how it holds up, but so far I'm impressed. A great buy for the price too.