Premium Baby One Piece Snap Suit Size Guide

Shop for a cute custom Baby One Piece outfit.

Our baby one piece snap suit is the Rabbit Skins™ Infant Baby Rib Bodysuit (style RS4400) — the garment behind every design in our baby snap suit collection. Lap shoulders and a three-snap closure make the many daily outfit changes easier, and it carries the same designs as our adult tees — including state t-shirts and anything you build in our online t-shirt designer — so baby can match the whole family.

About The Snap Suit

  • 5-ounce, 100% combed ring spun cotton 1×1 baby rib (heather is a cotton/poly blend)
  • Lap shoulders — slips over baby’s head gently
  • Innovative three-snap closure for fast changes
  • Flatlock seams and EasyTear™ label — nothing rough against baby’s skin
  • Double-needle ribbed binding on neck, shoulders, sleeves and leg openings

Baby one piece snap suit RS4400 in Banana, lifestyle photo

Baby One Piece Product Measurements

Garment measurements in inches, taken with the snap suit laid flat.

Measurement NB 06M 12M 18M 24M
Body Length at Back 11 1/2 12 1/2 13 1/2 14 1/2 15 1/2
Chest 7 1/4 8 3/4 9 3/4 10 3/4 11 3/4
Sleeve Length 2 1/2 2 3/4 3 3 1/4 3 1/2

Body Length at Back: high point of shoulder to finished hem. Chest: across the chest one inch below the armhole, laid flat. Sleeve Length: from center of neck, down the shoulder, down the sleeve to the hem.

Baby Snap Suit Size Chart By Age, Height & Weight

Pick baby’s size by age, height, and weight — weight is the most reliable of the three.

Size NB 06M 12M 18M 24M
Age (months) 0-3 3-6 6-12 12-18 18-24
Height (inches) 18-21 22-24 25-28 29-31 32-34
Weight (lbs) 5-9 10-16 17-20 21-24 25-27

Between sizes? Size up — babies outgrow the smaller size fast, and the rib knit fits comfortably with room to grow.

Care Instructions
Machine wash cold. Only non-chlorine bleach. Tumble dry low. Do not iron on the printed design. Do not dry clean. Not intended for sleepwear.

Shop Baby Snap Suits

More size guides: Men’s · Women’s · Youth · Toddler

Every design is printed on demand in Kentucky, USA and ships free — most orders within 24 hours.