Size chart
Nike baby size chart
Nike publishes 10 baby and toddler sizes, Newborn/0-3M to 4T, by weight and height. Checked against nike.com on October 4, 2026.
Size chart
- Newborn/0-3M6 to 9.5 lb
- 3M9.9 to 14.6 lb
- 6M15 to 17.9 lb
- 9M18.3 to 22 lb
- 12M22.5 to 24.9 lb
- 18M25.6 to 28 lb
- 24M28.4 to 30 lb
- 2T28.4 to 30 lb
- 3T30.4 to 33.1 lb
- 4T34 to 37.9 lb
Weight in lb, exactly as Nike publishes it.
Does Nike run small or large?
Runs largeAcross 6 size labels that other brands also use, Nike's published ranges cover bigger babies than the typical chart for the same label, by about a quarter to half a size. A given label should last a little longer.
Based on published size charts compared with other brands. This is not a fit review.
What a typical baby wears in Nike
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 | Nike size |
|---|---|---|---|
| Birth | 7.3 lb | 19.5 in | Newborn/0-3M |
| 3 months | 13.5 lb | 23.9 in | 3M |
| 6 months | 16.8 lb | 26.2 in | 6M |
| 9 months | 18.9 lb | 28 in | 9M |
| 12 months | 20.5 lb | 29.5 in | 12M |
| 18 months | 23.3 lb | 32.1 in | 18M |
| 2 years | 26.1 lb | 34 in | 2T |
| 3 years | 31.1 lb | 37.6 in | 3T |
The chart as published
The original wording from Nike's chart, size by size.
| Size | Weight | Height or length | Age |
|---|---|---|---|
| NB/ 0-3M | 6 - 9.5 lb / 2.7 - 4.3 kg | 20 - 22 in / 50 - 56 cm | 0 - 3 months |
| 3M | 10 - 14.5 lb / 4.5 - 6.6 kg | 22 - 24.5 in / 56 - 62 cm | 3 - 6 months |
| 6M | 15 - 18 lb / 6.8 - 8.1 kg | 24.5 - 26.5 in / 62 - 68 cm | 6 - 9 months |
| 9M | 18.5 - 22 lb / 8.3 - 10 kg | 26.5 - 29 in / 68 - 74 cm | 9 - 12 months |
| 12M | 22.5 - 25 lb / 10.2 - 11.3 kg | 29 - 31.5 in / 74 - 80 cm | 12 - 18 months |
| 18M | 25.5 - 28 lb / 11.6 - 12.7 kg | 31.5 - 34 in / 80 - 86 cm | 18 - 24 months |
| 24M | 28.5 - 30 lb / 12.9 - 13.6 kg | 34 - 36 in / 86 - 92 cm | 24 - 36 months |
| 2T | 28.5 - 30 lb / 12.9 - 13.6 kg | 33.5 - 36 in / 86 - 92 cm | 24 - 36 months |
| 3T | 30.5-33 lb / 13.8-15 kg | 36 - 38.5 in / 92 - 98 cm | 36 - 48 months |
| 4T | 34-38 lb / 15.4-17.2 kg | 38.5 - 41 in / 98 - 104 cm | 48 - 60 months |
Notes on this chart. Merges Nike's baby (NB to 24M) and toddler (2T to 4T) tables. Metric values are Nike's own. 24M and 2T have identical published age, weight, and metric height. Published weight ranges have small gaps between sizes.
Sources
- Brand's own site: https://www.nike.com/size-fit/infant-toddler-clothing
Retrieved October 4, 2026. Brands update their charts, so check the brand's page before a big purchase. This site is not affiliated with Nike.
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