Me too, and when I go to buy new ones I know exactly what size to buy. Six months ago, or so, I was in a store and I bought a new pair.  The lady at the till said "You didn't take very long choosing a size, did you?"  I just said "It's easy to buy clothes when you don't choose to get fat and the size doesn't change". (Sadly I still have to try things on at times, due to vanity sizing.  But not too often, mans clothing is still mostly sized in inches/cm.)