Okay my son is 10, and he plays little league baseball, and out of the blue they made it mandatory for all players to wear cups. So I went to Wal-Mart and they had two sizes; youth, and adult, so I got the youth. When he put it on, he complained that it was too small for him, and it wouldn't fit. So I initially thought he just didn't know how to put it on right, so I took a look, and the cup really was too small! So I had to get him the adult size cup to accomodate him. At the moment this isn't a big deal, He's not going through puberty becuase he has no pubic hair, he's just well endowed, the problem is that he will get bigger, and I won't know where to get larger cups to fit. All I ever see is Youth, and Adult, and if he's an adult's size now, he's gonna need something bigger in a few years. I personally have nothing special down there, so I've never had this problem. Please, no trolling or vulgar responses, this is a serious matter regarding my son. Thanks in advance.