Shouldn't it always be on the middle hole? I have a 32 belt and the middle hole is just a tiny bit tight. I have a 34 belt and the middle hole is just a bit loose, loose meaning the belt moves up and down easily.I believe belt size is determined by the length of the belt when tied using the middle hole of the belt. So a 32 belt can be worn by someone with a 31-33 waist quite easily, just by adjusting which belt hole you use. A 34 belt is probably not going to fit your 31 waist, but if it did, you would be using the last hole on the belt, which doesn't really look that great.