My 8 year old is super muscular and Calvin Klein & Ralph Lauren suits were way too tight in the legs and arms. I tried husky sizes, but he was swimming in them. This suit is amazing... super modern looking, slim fit but still room for athletic build and the pants are so comfortable, my son just leaves them on. Beautiful modern fabric as well. I wish appaman had clothes for boys bigger than size ten. Sadly, this will be our last year. This suit is so perfect!