Size chart
Bellabu Bear baby size chart
Bellabu Bear publishes 11 baby and toddler sizes, Newborn to 4T, by weight and height. Checked against bellabubear.com on October 4, 2026.
Size chart
- Newborn6 to 9 lb
- 0-3M9 to 12 lb
- 3-6M12 to 17 lb
- 6-9M17 to 20 lb
- 9-12M20 to 22 lb
- 12-18M22 to 25 lb
- 18-24M25 to 27 lb
- 2T27 to 30 lb
- 2/3T27 to 32 lb
- 3T28 to 32 lb
- 4T33 to 36 lb
Weight in lb, exactly as Bellabu Bear publishes it.
Does Bellabu Bear run small or large?
Runs smallAcross 10 size labels that other brands also use, Bellabu Bear's published ranges cover smaller babies than the typical chart for the same label, by about a quarter to half a size. Consider the next size up when in doubt.
Based on published size charts compared with other brands. This is not a fit review.
What a typical baby wears in Bellabu Bear
For a baby in the middle of the WHO growth chart, with room to grow. Your baby's own measurements give a closer answer in the calculator below.
| Age | Typical weight | Typical length | Bellabu Bear size |
|---|---|---|---|
| Birth | 7.3 lb | 19.5 in | Newborn |
| 3 months | 13.5 lb | 23.9 in | 3-6M |
| 6 months | 16.8 lb | 26.2 in | 3-6M |
| 9 months | 18.9 lb | 28 in | 6-9M |
| 12 months | 20.5 lb | 29.5 in | 12-18M |
| 18 months | 23.3 lb | 32.1 in | 18-24M |
| 2 years | 26.1 lb | 34 in | 2/3T |
| 3 years | 31.1 lb | 37.6 in | 4T |
The chart as published
The original wording from Bellabu Bear's chart, size by size.
| Size | Weight | Height or length | Age |
|---|---|---|---|
| newborn | 6 - 9 lbs | 18 - 21 in | Not published |
| 0-3 M | 9 - 12 lbs | 21 - 23 in | Not published |
| 3-6 M | 12 - 17 lbs | 23 - 27 in | Not published |
| 6-9 M | 17 - 20 lbs | 27 - 28 in | Not published |
| 9-12 M | 20 - 22 lbs | 28 - 29 in | Not published |
| 12-18 M | 22 - 25 lbs | 29 - 31 in | Not published |
| 18-24 M | 25 - 27 lbs | 31 - 33 in | Not published |
| 2T | 27 - 30 lbs | 33 - 35 in | Not published |
| 2/3T | 27 - 32 lbs | 33 - 36 in | Not published |
| 3T | 28 - 32 lbs | 35 - 37 in | Not published |
| 4T | 33 - 36 lbs | 37 - 40 in | Not published |
Notes on this chart. The brand publishes its chart as an image on its size chart page. Bellabu Bear sells sleepwear, so this one chart covers its range. It merges the convertible footie table (newborn to 18-24 M, plus 2/3T) with the pajama set table (2T to 4T).
Sources
- Brand's own site: https://www.bellabubear.com/pages/size-chart
- Brand's own site: https://cdn.shopify.com/s/files/1/2619/6002/files/size_chart_df5dea8b-51de-466d-8968-36372e04a7e7.jpg?v=1705092851
Retrieved October 4, 2026. Brands update their charts, so check the brand's page before a big purchase. This site is not affiliated with Bellabu Bear.
Calculator
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