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: 25 February 2026
- Extended Holiday Returns until Jan 31st
- Abigail K.Verified Buyer2/22/26ReviewingCocoon Swaddle Sack 1.0 TOG DaisiesRated 5 out of 5 starsBest place for my baby to sleep!
So much easier to make sure my baby was wrapped up and safe every night
- Helen K.Verified Buyer2/13/26ReviewingCocoon Swaddle Sack 1.0 TOG DragonfliesRated 5 out of 5 starsGift for upcoming grandchild
Great , safe option for baby sleep.
- David G.Verified Buyer2/5/26ReviewingCocoon Swaddle Sack 1.0 TOG Birthday BlobsRated 5 out of 5 starsDay One choice
The day my husband and I brought our son home from the hospital, we were exhausted and terrified (first child, unsurprisingly). It happened to be during one of the coldest stretches in NYC history — and we didn’t realize a window had been left cracked open when we left for the hospital. Our apartment very cold, and took hours to warm up with ancient, pre-war radiators. We had been gifted the “Swaddle Box” from BabyList, which included one of the ergoPouch Cocoon Swaddles. Even though it was the 1.0 TOG version, we were able to layer our son, get him zipped up in the swaddle, and comfortable way faster than using the wrap method. I bought 3 more of the same swaddles at 4am that same night. I even sent an extra thank you text to my cousin who bought the Swaddle Box for us! Easy to use, snug and secure, and, bonus, ergoPouch makes it easy to figure out the correct TOG rating for room temperature. Definitely plan to continue purchasing from ergoPouch!
