As a guy I feel this for shirts specifically, sometimes I have to wear an XL sometimes it's a L and once in a blue moon I can wear a M. Why you may ask? Because for some fucking reason damned near every shirt assumes medium means 5'7 twink with a shoulder width smaller than my chest width, I'm 5'5 barrel chested and with wide shoulders where sometimes I can't wear a shirt cause I am forced to A pose by the shoulders. Also I can sometimes rip medium sized shirts assunder if I flex my back right.