A secure, multi-functional swaddle and sleep sack in one, designed to be worn for sleep from birth.
Size Guide
Cocoon Swaddle Sack
Please use your child's weight and height to find the most appropriate and safe size for them.
Imperial Size Chart for ergoPouch Cocoon Swaddle Sack
|
ergoPouch Size
(same as size) |
Pouch Length (inch) | Child Weight (lb) | Child Height (inch) |
|---|---|---|---|
| 00000 | 18.5" | 4-7lbs | 19.7" |
|
0000 (Newborn) |
20.5" | 7-9lbs | 21.7" |
| 0-3M (000) |
23.6" | 7-13lbs | 24.4" |
| 3-6M* (00) |
27.6" | 13-18lbs | 24.4"-26.8" |
| 6-12M (0) |
29.9" (0.2/1.0 TOG) 31.5" (2.5 TOG) |
18-22lbs | 26.8"-29.9" |
*Previously size 2-6 months
Learn how to swaddle your baby for safety using the Cocoon Swaddle Sack
To comply with safety requirements, our Cocoon Swaddle Sacks have a firm fit around the neck, shoulder and chest area to prevent your little one from slipping inside. You should be able to put 2 fingers inside the neck opening for the correct fit. Please do not size up to the next size until your child meets the weight requirement, for safety reasons.
See full size guide for all products
Metric Size Chart
| ergoPouch Size
(same as size) |
Pouch Length (cm) | Child Weight (kg) | Child Height (cm) |
|---|---|---|---|
| 00000 | 47cm | 2-3kg | 50cm |
| 0000 (Newborn) |
52cm | 3-4kg | 55cm |
| 0-3M (000) |
60cm | 3-6kg | 62cm |
| 3-6M* (00) |
70cm | 6-8kg | 62-68cm |
| 6-12M (0) |
76cm (0.2/1.0 TOG) 80cm (2.5 TOG) |
8-10kg | 68-76cm |
*Previously size 2-6 months
- Free delivery on orders over $70*
- Estimated dispatch: 21 February 2026
- Extended Holiday Returns until Jan 31st
- Scott N.Verified Buyer2/17/26ReviewingCocoon Swaddle Sack 2.5 TOG Oatmeal MarleRated 5 out of 5 starsA great investment
I bought this cocoon swaddle bag for my newborn baby grandson. He has been sleeping in it since coming out of the hospital. He seems to love it and has been sleeping so well that he needs woken every 3 hours through the night for his feeds. I would definitely recommend this swaddle bag as it’s very cosy and easy to use.
- Frances B.Verified Buyer2/15/26ReviewingCocoon Swaddle Sack 2.5 TOG Sweet OrchardRated 5 out of 5 starsHugh quality sleeping bag
Fits beautifully, my baby is comfy and perfect temperature. I find this sleeping bag very easy to use when feeding my baby in the night, other bags get in the way. My baby also has reflux so is sometimes sicky in the night, this bag doesn't get wet on the inside meaning less disruptive changes for bub overnight
- Kristin H.Verified Buyer2/4/26ReviewingCocoon Swaddle Sack 2.5 TOG Night SkyRated 5 out of 5 starsBest sleep sack
Such a great sleep sack, so cozy. Undoing the domes is perfect as my 10 week old baby loves to get her arms up over her head to sleep. The pattern material is so cute too.
