I ordered the medium as being a 177cm tall female, I didn't want to feel skimped by something too short or small. These are a unisex arm warmer, so thought medium would be on the bigger side.
These are extremely long/ generous in length. They cut under my armpit and cover over my hand. They require pushing up so that I can have my watch on and in full view during a ride.
The fit is very snug, even for a female, and I would hate to think how tight these would be on an average built male. I would suggest for men to go up a size from what you would normally wear, and females use this sizing as a true female size-
I'm normally a medium in anything female clothing or a size 12, or a small men's. These are a great pair of arm warmers but the reflective section tends to get lost as you push up the sleeves for a watch. Maybe more reflective bands could make these feel safer for signaling at night, as I was expecting the reflective version to be just that. They feel soft and are easy to wash