Size chart
Gymboree baby size chart
Gymboree publishes 5 baby and toddler sizes, 12-18M to 4T, by weight and height. Checked against gymboree.com on October 4, 2026.
Size chart
- 12-18M26 to 28 lb
- 18-24M28 to 30 lb
- 2T30 to 32 lb
- 3T32 to 35 lb
- 4T35 to 39 lb
Weight in lb, exactly as Gymboree publishes it.
Does Gymboree run small or large?
True to sizeAcross 5 size labels that other brands also use, Gymboree's published ranges sit close to the middle of the pack. The same label covers about the same baby.
Based on published size charts compared with other brands. This is not a fit review.
What a typical baby wears in Gymboree
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 | Gymboree size |
|---|---|---|---|
| Birth | 7.3 lb | 19.5 in | under 12-18M |
| 3 months | 13.5 lb | 23.9 in | under 12-18M |
| 6 months | 16.8 lb | 26.2 in | under 12-18M |
| 9 months | 18.9 lb | 28 in | under 12-18M |
| 12 months | 20.5 lb | 29.5 in | under 12-18M |
| 18 months | 23.3 lb | 32.1 in | 18-24M |
| 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 Gymboree's chart, size by size.
| Size | Weight | Height or length | Age |
|---|---|---|---|
| 12-18 Months | 26 - 28 lbs. | 30 1/2 - 32" | Not published |
| 18-24 Months | 28 - 30 lbs. | 32 - 33 1/2" | Not published |
| 2T | 30 - 32 lbs. | 33 1/2 - 35" | Not published |
| 3T | 32 - 35 lbs. | 35 - 38" | Not published |
| 4T | 35 - 39 lbs. | 38 - 41" | Not published |
Notes on this chart. Partial chart: only 12-18 Months through 4T could be verified from the brand's size chart. Smaller baby sizes are sold by the brand but are not listed here. The girls and boys tables list identical height and weight.
Sources
- Brand's own site: https://www.gymboree.com/us/content/size-chart/toddler-girl-size-chart
- Brand's own site: https://www.gymboree.com/us/content/size-chart/toddler-boy-size-chart
Retrieved October 4, 2026. Brands update their charts, so check the brand's page before a big purchase. This site is not affiliated with Gymboree.
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