Size Small fit my 12 yr old, 85 pound son-- with modifications (gluing velcro to the rib pad itself so that the straps can over-reach and form a tighter fit).Pros:
Very flexible and form fitting. Lightweight. The Warrior Burn 13 rib pad has more substantial padding than the Maverik Rome, and no loss of flexibility.Cons:
Add velcro to the rib pad area, so that smaller kids can wear a size Small. I made this modification myself, so that it fit my 12 yr old son.