In Your Notes please specify what size as follows:

CHILD-BOY/UNI (unisex/boxy) + XS (4/5), S (5/6), M (7/8), L (9/10), XL (11/12) 

CHILD-GIRL (slim cut/cap sleeve) + XS (4/5), S (5/6), M (7/8), L (9/10), XL (11/12) 

ADULT-MALE/UNI (unisex/boxy) + S, M, L, XL, XXL

ADULT-Female (Slim cut) + XS (0/2), S (4/6), M (8/10), L (10/12), XL (12/14), XXL (14/16), XXXL (14/16)