When I purchased this I was skinny, and was running regularly. I'm 5'10" and was 163lbs, and these Mediums were still too snug. I should have returned them, but toughed it out. I've gained some weight, and don't run as much so they don't fit anymore. They run really small. So if you are a "small" these should fit pretty well. Or a skinny medium, they will be perfect. If not, they will be too small. I didn't wear them that much tbh, because they were always too snug.

Sorry no returns, I'm not a store, just a guy, I've had new items (and pre-owned) returned damaged before, I can't afford to keep taking losses. I've never had any complaints.