Just a random marketing stat for Saturday. When buying shirts for software executives I found this distribution:
M 15% L 37% XL 35% 2XL 13%
If you have to buy shirts I’d suggest a similar purchasing pattern (unless you have other data?).
Another point – I’ve always made it a point to get women’s shirts for them if they are working on behalf of the company. Nothing looks lamer to me than a woman who’s been given a company shirt that fits like a feed bag.