Small 36-38" Chest Medium 38-40" Chest Large 42-44" Chest XL 44-46" Chest XXL 46-48" Chest 3XL 48-50" Chest XS - 34-36" Chest Size

7-8 Years - 26-28" - 71cm 9/10 Years - 28-30" - 76cm 11/12 Years - 30-32" - 81cm 13/14 Years - 32-34" - 86cm 15/16 Years - 34-36" XS Boys - 5/6 Years