Measurements for Jackets (in inches):

XS 

Shoulder 19, Chest 16, Length 25, Sleeve 25

S

Shoulder 20, Chest 18, Length 26, Sleeve 25.5

M

Shoulder 20.5, Chest 19, Length 27, Sleeve 26

L

Shoulder 21, Chest 19.5, Length 28.5, Sleeve 26.5

XL

Shoulder 22, Chest 20.5, Length 29, Sleeve 26.5

It is advisable to order a size up so your cadet can grow into this item!