Hey steve- getting ready to send in the mail-in form for my membership- and want to order the kids some t-shirts- question is- 4T is the only size for kids? other than the small ones-- could you tell me how much bigger the adult S is compared to the 4t? each manufacturer of clothing has different measurements- and 1 of my kids is too big for a 4t - but I think to small for a small-- thanks! Brandy LOVING the new Duramax!!!