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

By the Babbez team

Shopping European or international brands? Our European size conversion chart (50 to 140) explains the height-in-centimeters system.

See also our Sizing-Spread Index — how far the same label stretches across brands, in one number. For diapers, see the Babbez Diaper Size Index: weight ranges by size from 12 brands.

The same baby size label means different things at different brands. We read 30 brands' published size charts: across the 28 that print a 3-6M weight, that 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.

Related card: “The same size label ≠ the same size.” See it on Instagram (opens Instagram).

How much does the same label vary across brands?

For each label, the table shows how many of the 30 brands print a weight for it, the range of their stated upper weight limit, the spread between the smallest and largest brand, the median (taken across distinct charts, so brands that print identical weights count once: 12 to 27 charts per label), 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 the 27 brands that print a 0-3M weight — a 4 lb spread.
• The same '3-6M' label tops out anywhere from 14.5 lb to 20 lb across the 28 brands that print a 3-6M weight — a 5.5 lb spread.
• The same '6-9M' label tops out anywhere from 18 lb to 22 lb across the 22 brands that print a 6-9M weight — a 4 lb spread.
• The same '9-12M' label tops out anywhere from 22 lb to 26 lb across the 18 brands that print a 9-12M weight — a 4 lb spread.
• The same '12-18M' label tops out anywhere from 24 lb to 28 lb across the 28 brands that print a 12-18M weight — a 4 lb spread.
• The same '18-24M' label tops out anywhere from 26 lb to 32 lb across the 26 brands that print an 18-24M weight — a 6 lb spread.
• The same '2T' label tops out anywhere from 28 lb to 33 lb across the 18 brands that publish a 2T weight limit — 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) (+1.6 lb avg), The Children's Place (+1.3 lb avg), Gap (babyGap) (+1.0 lb avg), Amazon Essentials (baby) (+0.7 lb avg), Hatley (+0.7 lb avg). Below the median (the label covers lighter babies on paper): Target Cat & Jack (-0.9 lb avg), Nike (infant/toddler) (-1.1 lb avg), Hanna Andersson (-1.2 lb avg), Old Navy (-1.4 lb avg).
• Several brands publish the same grid: Carter's and Simple Joys by Carter's, Gap and Colored Organics, Walmart's Garanimals and Wonder Nation, and the EU height grid shared by H&M and Zara with different age labels. 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) and rounded to one decimal, half away from zero; four averages sit exactly on a half (Patagonia 1.55, Gap 0.95, Mini Boden 0.75 and L.L.Bean 0.25 lb), shown as 1.6, 1.0, 0.8 and 0.3. 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.

<p>Across 30 baby-clothing brands, the same size label varies by up to 6&nbsp;lb in its published weight range from Preemie to 5T &mdash; which is why a &ldquo;3&ndash;6M&rdquo; from one brand can be a different fit at another. Source: <a href="https://babbez.com/blogs/baby-clothes/baby-clothing-size-index-2026">Babbez Baby Clothing Size Index</a>.</p>

Methodology and sources

30 brand-published charts, retrieved 2026-09-02 (Hanna Andersson's Baby & Toddler chart re-read 2026-10-04): 20 read from the brand's own chart page, 4 from a product-page size guide (Amazon Essentials, Colored Organics, H&M, Primary), Zara's from the size labels on its product pages, 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. Each brand counts once per label: Carter's separate 'Up to 5 lb' row is left out (as Little Sleepies' and KicKee Pants' micro-preemie rows are), and Nike's '24M' row is left out because Nike prints it as 24-36 months. A label counts as 4T or 5T when the brand prints it as 4T/5T or as part of its toddler size line (babyGap's '4 yrs' and '5 yrs'); a bare kids-size number printed after the toddler line or on a separate kids chart does not (Hanna Andersson's and KicKee Pants' '5'). Two brands count as one chart only when they print identical weight ranges on every label they share; such charts are counted once in the statistics and reported as a finding: the Gap grid (also printed by Colored Organics), and, among the charts we folded into a brand, Carter's (Simple Joys by Carter's) and Walmart's Garanimals (the Wonder Nation asset). KicKee Pants and Kyte Baby print different weights at Preemie, Newborn and 0-3M, so each is its own chart. 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; 27 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) — Simple Joys by Carter's prints the same weights; OshKosh B'gosh, whose chart is published on carters.com, is folded into this row (its printed 4T starts at 34 lb, Carter's at 33 lb)
• 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 labels (retrieved 2026-09-02; Zara has no size-chart page, so heights were read from the size labels on its product pages) — 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 Baby & Toddler size chart (retrieved 2026-10-04) — Newborn to 3T; its separate kids chart (sizes 3, 4, 5 by cm height) is not mapped to 3T-5T
• 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; chart image re-read 2026-10-04) — sleepwear-led chart (CPSC sleepwear sizing basis, see methodology); read from the brand's chart image; its own chart in the statistics (it differs from Kyte Baby at Preemie, Newborn and 0-3M and adds 6-9M and 9-12M; its kids size 5 is not counted as 5T)
• 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) — aligned by Nike's printed age row (3M = 3-6 months... 18M = 18-24 months); its dual-labeled 'NB/0-3M' row (6-9.5 lb, a newborn range) counts as Newborn, and its 24M (24-36 months) is not mapped
• 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.

For a two-year-old, size 2 clothing and 2T often overlap, which this explainer untangles step by step.

For a single reference you can keep open while you shop, see our baby size chart by age, weight and height.

Download the data and cite this study

The label-level dataset (version 1.1) — for every size label, how many of the 30 brands print a weight, the range, spread and median of their published upper weight limits, and the range of upper height limits — is free to download and cite: Download the Babbez Size Index 2026 dataset (CSV).

Cite this: Babbez Editorial Team. Baby Clothing Size Index 2026: How Much the Same Size Label Varies Across 30 Brands. Babbez, 2026. https://babbez.com/blogs/baby-clothes/baby-clothing-size-index-2026

Want the quick version? See which baby brands run big or small across 22 brands' published charts.

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