Also available for the whole family! our action mountie onesie is way more fun to put on than sweats, and cozier than regular ol’ pyjamas. A playful piece for keeping your little one toasty this season, our onesies are perfect for slipping under a snowsuit or playing around the house. harrison is 5'3" tall and wears an adult xs. onesie measurements: xs (5'2" and under): body length: 56.5" chest width: 18.25" s (5'2" - 5'6"): body length: 59.5" chest width: 19.5" m (5'6" - 5'10"): body length: 62.5" chest width: 20.75" l (5'8" - 6'): body length: 65.5" chest width: 21.75" xl (6' - 6'3"): body length: 67.5" chest width: 23.25" xxl (6'3+): body length: 70.5" chest width: 24.75" cozy thermal waffle knit. 55% cotton. 42% polyester. 3% spandex. machine wash warm, do not bleach, tumble dry low on gentle cycle. Wash with like colours.