I measured myself according to the instructions and ordered the correctly sized product. Trying them on, they are way too large. I even re-measured myself as I thought I must have made a mistake. I measured at a 40, and even bought some for my Dad at a 38. I tried the 38 on myself, and even they were too big. The 36 would probably have fit correctly. I am trying to send them back to purchase the correct size now, but Amazon are saying I wont be refunded. So, why would I send them back???