Today I was fortunate to come across this 3/2 un-darted jacket with patch and flap pockets.
All this loose regard for size gets even murkier in the thrift shops. Many of these places are not so organized as to have the items sized. Even when they are, it mostly doesn't matter. I find suits separated by S M L designations, sometimes finding things that fit me in each category. Pants may be separated by waist size, but I currently own pants ranging in size from 33 to 36.My shirts are half size 15, the rest 15 1/2. The point is, to navigate these waters successfully, you've got to look through everything in the store, and more importantly learn to ignore the numbers, which mean nothing, and pay attention to the fit, which means everything.
Once you get the hang of this, you'll even be able to size things up "by eye" as it were. When all else fails, try something on and be honest about it's fit, then check the size later. Don't try to pretend you haven't gained ten pounds in the last few years, and don't forget that every guy, no matter what style he may choose to adopt, looks better in clothes that fit. Above all else, find a good tailor and stick with him like a brother.
Size does matter, numbers don't.