XSB (3-4 Years) SB (5-6 Years) MB (7-8 Years) LB (9-11 Years) XLB (12-13 Years) Small (34-36") Medium (38-40") Large (42-44") XL (45-48") XXL (50-52") Womens XS (Size 8 - 30"Chest) Womens S (Size 10 - 32"Chest) Womens M (Size 12 - 34"Chest) Womens L (Size 14 - 36"Chest) Womens XL (Size 16 - 40"Chest) Womens XXL (Size 18 - 40"Chest)

Small 34-36"Chest (88/96cm) Medium 38-40"Chest (96-104cm) Large 42-44"Chest (104-112cm) XL 46-48"Chest (112-124cm) XXL 50-52"Chest (124/136cm) 3XL 54-56"Chest (136-148cm) Adult 4XL - 55-57"(148-160cm) Adult 5XL - 58-60"(160-172cm) SB 25-27"Chest (66/69cm) MB 27-29"Chest (69/75cm) LB 30-32"Chest (75/81cm) XLB 32-35"Chest (81.5/88.5cm) XSB 3/4yrs (98-104cm) SB 4/5yrs (104-110cm) MB 5-6yrs (110-116cm) LB 6-7yrs (116-122cm) XLB 7-8yrs (122-128cm)