Realtalk, AA thermal henleys (sized up one) are one of the best-fitting articles of clothing ever. I have an RRL henley that comes close, and my WvG henleys win in terms of sheer beefiness, but the AA ones win hands-down in terms of fit. OTOH, I've had one literally fall apart on me the first time I wore it. I'm surprised there was anything left to pass along to your son, maybe a pile of thread, a few scraps of fabric, and some tiny plastic buttons. I still need to find someone who will reverse-engineer one using better materials, construction, and trims.