Sizes from each brand's own chart (85 brands), for the exact item you're buying.
Leave blank to compare all brands.
"General brand shoe chart" uses the brand's general shoe-size guide, which may not apply to every footwear style.
For babies, measure length lying down, from the top of the head to the heel. Kids who can stand: measure against a wall, no shoes.
Pick the age they'll be when they actually wear it. Sizes are based on a typical child of that age (WHO growth averages). If they run big, go one size up.
With their age, we forecast from their own growth. Leave it blank to use an average.
Choose a brand at the top to see its full size chart here.
These brands publish their size charts only as images, per product, or in a way we can't yet confirm. We'll add them once the numbers are checked.
Want the numbers behind the result? See the Kids Size Chart for sizes 2T–16 compared across brands, the Size Index 2026 to see how size labels differ between brands, or How We Check Sizes for where each chart comes from. Buying shoes too? Try the Shoe Size Calculator.
Each result names the chart it used, links to the brand's own page and shows how the chart was checked: Verified (compared value by value with the brand's official chart, captured October 2026), Checked (the brand's published chart read twice, September 2026) or Needs review (an open question about the brand's own numbers, explained under the result).
Age is optional: it changes the wording and the growth forecast, never the size. The forecast for future sizes is a rough estimate from WHO growth curves, not from the brand.
Each brand sets its own ranges. A 13 lb baby is a 6M at Carter's but a 3–6M at Gerber. Most American brands size by weight and height. European-style brands like H&M size by height in centimeters, so a size 68 fits a baby up to 68 cm long.
Yes. Enter your child's height and weight, and switch the age to years. Most brands here go up to size 12 or 14, which fits kids up to about 12 years old. Brands that stop at toddler sizes are listed under the results as "Too big for".
From about size 6, some brands, like Cat & Jack, Tea Collection and Joe Fresh, cut girls' and boys' clothes a little differently. If you don't choose, we show the girls' size and note the boys' size when it's different.
Yes. Choose the brand in "Which brand are you shopping for?" at the top. You'll get one clear answer, the sizes just above and below it, and that brand's full chart. Choose "Compare all brands" to see every brand side by side again.
Some brands publish separate charts for each kind of clothing. Carter's pants chart uses waist, and its jacket chart uses chest and allows for layers. When a brand has only one chart, we use it for all clothing and label the tag "General chart".
Check both. If they point to different sizes, choose the bigger one. A size that's too long is still wearable; one that's too short in the body won't close.
In the US, children's sleepwear must either be flame-resistant or fit snugly. Many brands, including Burt's Bees Baby and Gerber, make close-fitting cotton pajamas, so a snug fit is normal. Buy the size the chart gives rather than going bigger.
When the meter on a tag is near the top, or snaps start pulling across the belly or legs. Most babies move up a size every 2 to 3 months in the first year.
Size charts checked September to November 2026, from each brand's published size charts; each result shows how and when its chart was checked. OshKosh B'gosh uses the same charts as Carter's. Brands update their charts, so confirm on the retailer's page before buying. Brand names are used only to identify their size charts; this site is not affiliated with any brand.
Size data last changed 6 Nov 2026 · page updated 7 Nov 2026