These polos by Volcom are in a size medium, which is the equivalent to about a 10/12 in boys sizes. One is a charcoal gray and the other is a teal green. The teal shirt is definitely bigger than the gray. See pics for details of each shirt. Both are in GUC with tons of wear left in them. Approx measurements: Gray: 15” armpit to armpit 7 3/4” sleeve length from shoulder seam 22” total length Teal: 16” armpit to armpit 8 3/8” sleeve length from shoulder seam 23” total length