Baby Clothing Size Index 2026: How Much the Same Size Label Varies Across 30 Brands

By the Babbez team · September 2026

The same baby size label means different things at different brands. We read 30 brands' published size charts: the 3-6M label alone tops out anywhere from 14.5 to 20 lb depending on the brand. This Index shows the spread for every label, whose published charts cover heavier or lighter babies under the same label, and how to buy by weight instead of by label.

How much does the same label vary across brands?

For each label, the table shows how many brands publish it, the range of their stated upper weight limit, the spread between the smallest and largest brand, the median, and the stated upper height limit. Everything comes from the brands' own charts, retrieved on the date in the sources list.

Source: each brand's published size chart, retrieved 2026-09-02. Ranges are the brands' own stated limits; Babbez did not handle or test any garment. Charts change; check the brand before you buy.

What stands out in the data?

• The same '0-3M' label tops out anywhere from 11 lb to 15 lb across 24 brands' published charts — a 4 lb spread.
• The same '3-6M' label tops out anywhere from 14.5 lb to 20 lb across 26 brands' published charts — a 5.5 lb spread.
• The same '6-9M' label tops out anywhere from 18 lb to 22 lb across 20 brands' published charts — a 4 lb spread.
• The same '9-12M' label tops out anywhere from 22 lb to 26 lb across 17 brands' published charts — a 4 lb spread.
• The same '12-18M' label tops out anywhere from 24 lb to 28 lb across 26 brands' published charts — a 4 lb spread.
• The same '18-24M' label tops out anywhere from 26 lb to 32 lb across 25 brands' published charts — a 6 lb spread.
• The same '2T' label tops out anywhere from 28 lb to 33 lb across 16 brands' published charts — a 5 lb spread.
• The Children's Place's published upper limit for 6-9M (22 lb) equals Walmart Garanimals's upper limit for the next label up (its 9-12M-equivalent, 22 lb) — the same baby lands one label apart depending on the brand.
• Everyday charts whose published upper limits sit above the label median (the label covers heavier babies on paper): Patagonia (baby) (+1.5 lb avg), The Children's Place (+1.2 lb avg), Gap (babyGap) (+0.9 lb avg), Amazon Essentials (baby) (+0.7 lb avg). Below the median (the label covers lighter babies on paper): Primary (-0.7 lb avg), Target Cat & Jack (-1.0 lb avg), Nike (infant/toddler) (-1.1 lb avg), Old Navy (-1.5 lb avg).
• Several brands publish the same grid: the Carter's grid (also used by OshKosh B'gosh and Simple Joys), the Gap grid (also used by Colored Organics), the EU height grid shared by H&M and Zara with different age labels, and the Kyte Baby grid (identical at KicKee Pants). A few charts are de facto standards adopted across brands.

Whose labels cover heavier or lighter babies on the published charts?

We compared each brand's published upper weight limit with the median for that label, then averaged across the labels the brand publishes (minimum three). A positive number means the brand's limits sit above the median (its labels cover a heavier baby); negative means below. This describes the charts only: cut, stretch and fabric also change how a piece fits, and we say so plainly on our sizes-by-brand guide. Sleepwear-led charts (KicKee Pants, Kyte Baby, Little Sleepies, Magnetic Me, Posh Peanut) are left out of this table because U.S. children's sleepwear is sized close to the body by design under the CPSC children's sleepwear regulations (garments must be snug-fitting or flame-resistant), so those charts are built on a different basis; they stay in the label table above.

How should you use this when buying?

1. Weigh and measure your baby (or use the last pediatric visit numbers you already have).
2. Open the brand's own chart and pick by weight and height, not by the age on the label. Our baby clothes sizes by age guide gives the typical ranges if you want a starting point.
3. Crossing brands or countries? The size converter translates US, UK, EU and AU labels.
4. Buying ahead for a gift or a season? Read what size to buy ahead first, and browse by age at baby and toddler.

Methodology and sources

30 brand-published charts, retrieved 2026-09-02: 25 read from the brand's own chart page and 5 from the brand's published chart image (Kyte Baby, Magnetic Me, KicKee Pants, Monica + Andy, Quincy Mae). For each chart we recorded the stated weight and height limits for every baby and toddler label and aligned labels by the brand's printed age band (so "3M", "0-3 months" and "0/3" map to 0-3M, and a brand whose "3M" is printed as 3-6 months is aligned to 3-6M). Where a chart is in kilograms or centimeters we converted to pounds and inches and rounded to one decimal. Printed zeros and one printed typo were excluded from calculation and kept in the notes. Charts that are identical across brands are counted once in the statistics and reported as a finding: the Carter's grid (also used by OshKosh B'gosh and Simple Joys), the Gap grid (also used by Colored Organics), the Kyte Baby grid (identical at KicKee Pants), and Walmart's Garanimals chart (identical to the Wonder Nation asset). H&M and Zara publish an EU height grid without weights and with their own age bands, so they appear as a finding, not in the label statistics; 26 distinct grids enter the statistics. Where a brand splits toddler charts by gender we used the chart only when the girls' and boys' values are identical, and otherwise stopped at 24M. Sleepwear-led charts (sized close to the body under the CPSC children's sleepwear regulations linked above) are marked in the sources and excluded from the heavier/lighter comparison. One brand's chart is published on its own Amazon listing rather than a brand website and is marked as such; one capture is partial and is marked. We did not handle or test any garment. Brands with no published chart, or whose chart could not be loaded on the retrieval date, are not included. This is a comparison of published information, not a claim about any brand's quality, and it is not growth or medical guidance.

• Carter's: published size chart (retrieved 2026-09-02) — grid also used by OshKosh B'gosh and Simple Joys (folded into this row)
• Gerber Childrenswear: published size chart (retrieved 2026-09-02)
• Gap (babyGap): published size chart (retrieved 2026-09-02)
• Old Navy: published size chart (retrieved 2026-09-02)
• H&M (baby): published size chart (retrieved 2026-09-02) — EU height grid ('fits up to' heights, no weights; H&M's own age bands differ from US labels) — reported as a finding, not in the statistics; EU height grid ('fits up to' heights), no weights
• Zara (baby): published size chart (retrieved 2026-09-02) — same EU height grid as H&M with different age labels (reported as a finding, not in the statistics)
• Target Cat & Jack: published size chart (retrieved 2026-09-02)
• Target Cloud Island: published size chart (retrieved 2026-09-02)
• Walmart Garanimals: published size chart (retrieved 2026-09-02) — identical to Walmart's generic infant/toddler chart shown on Wonder Nation (folded)
• The Children's Place: published size chart (retrieved 2026-09-02)
• Hanna Andersson: published size chart (retrieved 2026-09-02) — partial capture (NB and 2T rows missing)
• Primary: published size chart (retrieved 2026-09-02)
• Burt's Bees Baby: published size chart (retrieved 2026-09-02)
• Kyte Baby: published size chart (retrieved 2026-09-02) — sleepwear-led chart (CPSC sleepwear sizing basis, see methodology); read from the brand's chart image
• Little Sleepies: published size chart (retrieved 2026-09-02) — sleepwear-led chart (CPSC sleepwear sizing basis, see methodology)
• Magnetic Me: published size chart (retrieved 2026-09-02) — sleepwear-led chart (CPSC sleepwear sizing basis, see methodology); read from the brand's chart image
• KicKee Pants: published size chart (retrieved 2026-09-02) — sleepwear-led chart (CPSC sleepwear sizing basis, see methodology); read from the brand's chart image; identical grid to Kyte Baby (counted once)
• Posh Peanut: published size chart (retrieved 2026-09-02) — sleepwear-led chart (CPSC sleepwear sizing basis, see methodology)
• Monica + Andy: published size chart (retrieved 2026-09-02) — read from the brand's chart image
• Quincy Mae: published size chart (retrieved 2026-09-02) — read from the brand's chart image
• Tea Collection: published size chart (retrieved 2026-09-02)
• Janie and Jack: published size chart (retrieved 2026-09-02)
• Nike (infant/toddler): published size chart (retrieved 2026-09-02)
• Amazon Essentials (baby): published size chart (retrieved 2026-09-02) — chart published on the brand owner's own Amazon listing, values verbatim
• Hudson Baby: published size chart (retrieved 2026-09-02)
• Mini Boden: published size chart (retrieved 2026-09-02)
• Hatley: published size chart (retrieved 2026-09-02)
• Patagonia (baby): published size chart (retrieved 2026-09-02) — 2T-5T heights are single target lengths, excluded from height statistics
• L.L.Bean (baby): published size chart (retrieved 2026-09-02)
• Colored Organics: published size chart (retrieved 2026-09-02) — identical to the Gap baby rows (counted once)

Sizing information only. This guide does not give medical or growth advice; for questions about your baby's growth, talk to your pediatrician. Read our disclaimer.

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