The Sleep Onesie is a TOG-rated sleep sack alternative, designed to be worn on its own during sleep or with a Romper/PJs underneath for warmth and comfort.
Size Guide
Sleep Onesie
Please use your child's height to find the most appropriate and safe size for them. The Sleep Onesie should be fitted around the neck to avoid your child slipping through. 2.5 TOG and 3.5 TOG Sleep Onesies should not be used in a 5-point harness or car seat for safety reasons.
| ergoPouch size | 6-12M | 12-24M | 2-3Y | 4-5Y | 6-8Y | 8-10Y | 10-12Y |
|---|---|---|---|---|---|---|---|
| Same as size | 0-1y | 1-2y | 2-3y | 4-5y | 6-8y | 8-10y | 10-12y |
| Pouch length (cm/inch) | 74cm / 29.1" | 84cm / 33.1" | 88cm / 34.6" | 98cm / 38.6" | 110cm / 43.3" | 120cm / 47.2" | 130cm / 51.2" |
| Chest width (cm/inch) | 27.5cm / 10.8" | 30.5cm / 12" | 32cm / 12.6" | 35cm / 13.8" | 38cm / 15" | 40cm / 15.7" | 42cm / 16.5" |
| Child height (cm/inch) | 68-84cm / 26.8 - 33.1" | 76-92cm / 29.9 - 36.2" | 92-100cm / 36.2 - 39.4" | 108-115cm / 42.5 - 45.3" | 120-130cm / 47.2 - 51.2" | 130-140cm / 51.2 - 55.1" | 140-150cm / 55.1 - 59.1" |
- Free delivery on orders over $70*
- Estimated dispatch: 30 January 2026
- Extended Holiday Returns until Jan 31st
- Yasmin C.Verified Buyer1/26/26ReviewingSleep Onesie 3.5 TOG DragonfliesRated 5 out of 5 starsAmazing product
Been using for years now from newborn to toddler using different products. Loved the suit as a transition from the pouch and lets our little front sleeper pop his bum up in the air. So easy for wrigglers to move freely. Great quality, keeps them so warm, washes nicely and last forever - all of ours stayed so nice they went to other people after!
- Ines E. D. L.Verified Buyer1/14/26ReviewingSleep Onesie 2.5 TOG Petit PretzelRated 5 out of 5 starsGood onsie
Fast delivery. Thanks
- Kathleen L.Verified Buyer1/7/26ReviewingSleep Onesie 2.5 TOG DragonfliesRated 1 out of 5 starsdid not receive my item
did not receive my item and no one returned my call. The tracking said that a label was created yet it was never sent. I will be calling until i get through to get my money back.
