Boys size 10/12 mix and match 3 piece dressy outfit. 
These pieces all can easily match with other items like polos, t-shirts, shorts and they can be worn together as a dressy outfit for special occasions like Easter or Summer Spring weddings.

My son wore these all when he was a size 10/12, please see measurements below for best fit.

Gray top is Chaps size 10/12
Vest is a gray seersucker button front Dressed Up by Gymboree size 10/12 
Pants are Crewcuts in an intentionally faded red (almost dark salmon color) chino 5 pocket style size 10 

Clean preowned condition without stains, snags or pilling. Size tag in pants was cut in half.
Pants have zipper and button fly closure + inner adjustable waistband.

Approximate measurements laying flat:
Vest: chest 14.5” / total length 17.5”
Shirt: chest 17.5” / total length 23.5”
Pants: waist 12.5” / total length 33.5”