Same DRUG, smaller size. Keep those kids warm. Sleeves will most likely need to be rolled. Grom in the pic is 5 years old and wearing a small.
General size guideline (may vary slightly):
CHEST (armpit to armpit, so x2)
LENGTH (back of neck to bottom of rug)
SLEEVE (shoulder seam to sleeve end)
S - CHEST: 14.5in - LENGTH 18.5in - SLEEVE: 15.5in
M - CHEST: 15.5in - LENGTH: 19in - SLEEVE: 14in
L - CHEST: 18in - LENGTH: 22in - SLEEVE: 17.5in
XL - CHEST: 19in - LENGTH: 23in - SLEEVE: 19in
Wash cold. Tumble dry cool. These have not been washed yet, you'll need to wash them to get some of the fuzzy liner out. No returns or exchanges unless damaged.