Kids Shoe Size Chart & Calculator

Kids shoe size conversions

There is no single official conversion between brands or countries: each brand decides which foot length each size fits. The safest conversion goes through foot length, which is what these tables do.

Same foot, different brands

The size each brand's own chart gives for the same foot length, worked out with the calculator's matching rules. "or" means the brand lists two sizes for that length.

Sources: Carter's (carters.com, verified Nov 2026), Nike (nike.com, checked Nov 2026), New Balance (newbalance.com, checked Nov 2026), Stride Rite (striderite.com, checked Nov 2026), adidas (adidas.com, checked Nov 2026).

European (EU) and US kids' sizes

Jacadi prints the US size next to each European size on its own chart. Other brands may pair them differently, so use this for Jacadi and as a rough guide only.

Source: jacadi.us (checked Sep 2026).

Inches to centimetres

For brands that print only one unit (1 inch = 2.54 cm exactly):

Kids shoe size groups explained

Kids' shoe sizes run in groups. Toddler sizes count up to about 13 or 13.5; then the numbering starts again at 1 for big kids' sizes. So a toddler 3 and a big-kid 3 are very different shoes, and a size number on its own isn't enough: you also need the group.

• Letters mark the group at many brands: C for toddler and little-kid sizes and Y for big-kid sizes (Nike, Converse, Vans, Champion, See Kai Run, Sorel, Carter's 1Y–4Y); K at adidas, Under Armour, Burton and UGG; J at Crocs and Native; T at UGG and Kamik.
• Groups overlap. Nike's Little Kids table starts at 8C, inside its Babies & Toddlers table, and gives some of the same sizes different centimetres. Choose the group printed on the shoe you're buying; in the calculator, pick it under "sizing group".
• Group names differ from brand to brand, as the table shows.

How kids' shoes should fit

The chart gets you to the right size; a quick check in the shoe confirms it.

• Check standing up, with the socks your child will wear, after they've walked a few steps.
• Feel for the longest toe through the front of the shoe: toes shouldn't press against the end or curl.
• Check the heel and width. The heel shouldn't slip out as they walk, and the sides shouldn't bulge or leave red marks.
• Between two sizes? Most brands that say so advise the bigger size.

What the brands advise

• Nike: measure both feet and use the longer one. If you're between sizes, size up.
• Stride Rite: if your child is between sizes or one foot is bigger than the other, buy the bigger size.
• New Balance: if your child's feet are between sizes, choose the larger size.
• Robeez: leave about half an inch between the longest toe and the tip of the shoe.
• See Kai Run says its chart already includes growing room.
• Converse says Chuck Taylor sneakers run about a half size large.
• Start-Rite says growing room is already built into its sizes, and makes widths E (narrow), F (standard), G (wide) and H (extra wide). This calculator uses foot length only, so check the width too.
• Bobux says its sizes include about 7 mm of growing room plus 7 mm of wiggle room; its shoes come in one standard width, between an F and G fitting.
• Kickers: if your child is between sizes, go up a size.
• Next also lists foot-width ranges for widths E to H, measured around the ball of the foot. This calculator uses foot length only; use the larger foot.
• M&S also lists narrow, standard and wide joint (foot width) measurements. This calculator uses foot length only, so check the width too.
• Clarks makes kids' shoes in widths E (narrow) to H (extra wide), and says ruler measurements don't always match its in-store foot gauge.

Foot length or insole length? Most charts list the foot length each size fits. BOSS lists the shoe's insole length instead, so the foot has to be shorter than the insole; the result says to check the fit. Width: we don't yet hold verified width figures for any brand, so check the product page if your child has wide or narrow feet.

How to use the kids shoe size calculator

1. Choose the brand, or leave it blank to compare the 42 brands with a kids' shoe chart.
2. Choose the shoe type. The list shows only the types the brand's charts are confirmed for: a chart the brand publishes for that product (Carter's crib shoes and Every Step first walkers; Robeez Soft Soles, Snap Booties, First Kicks, water shoes and slippers; Stonz Journey boots; Old Navy flip-flops and slippers), or the brand's own word that its chart covers it (Carter's category pages, Nike, Timberland's Boots & Shoes chart, Burton and Kamik boots, and product pages that show the same size guide: Sorel boots and clogs, Crocs clogs, UGG, KEEN, Native Shoes, Clarks and OshKosh B'gosh). A brand's general kids' shoe guide is used for sneakers and everyday shoes; types it doesn't mention are listed as not confirmed, and a type that doesn't apply to the brand you pick goes back to "General brand shoe chart", which uses the brand's general shoe-size guide and may not apply to every footwear style.
3. Choose the sizing group when the brand prints separate families, under the brand's own names: Nike Babies & Toddlers, Little Kids and Big Kids; Skechers Infant, Toddler, Little Kids and Big Kids; Timberland Infant, Toddler, Youth and Junior; Old Navy baby, toddler and kids charts; Converse Babies & Toddlers and Kids; Vans Toddlers', Kids' and Youth Shoes; adidas, New Balance, Puma, Reebok, KEEN, Sorel and others. "All sizes" picks the group from the foot length. Brands that print one table have no group choice.
4. Enter the foot length in inches or centimetres. The size is the first one whose published length is at or just above it. BOSS prints the shoe's insole length instead of foot length and gives no allowance, so the result says to check the fit. We don't yet have verified width figures for any brand, so there is no width field.

Buying clothes as well? The Clothing Size Calculator does the same for clothing, using your child's weight and height with each brand's own chart.

What the result means

• ✓ Chart match: your child's foot length matches one size on the brand's chart (the first size whose published length is at or just above it).
• More than one size fits: the brand's size groups overlap, so two sizes cover this foot length (for example where Nike's Babies & Toddlers and Little Kids tables meet at 8C–10C). Both are shown with their group; check which group the shoe you're buying comes in.
• Bigger than this chart or Smaller than this chart: the brand doesn't list a size for this foot length. Check the length and the units, or the sizing group you chose.
• Estimate: the brand doesn't print foot lengths for these sizes, so they come from its own shoe chart (Old Navy flip-flops and slippers).
• No verified chart: the brand doesn't publish a chart for this shoe type, and we don't borrow one from another brand or another type.

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).

Where these kids shoe size charts come from

Every size comes from the brand's own published chart; we don't average brands together or fill in missing sizes. Each result and each brand above shows how its chart was checked:

• Verified 20 brands. Compared value by value with the brand's official chart (October and November 2026).
• Checked 21 brands. The brand's own published chart, read twice.
• Needs review 1 brand (Robeez). There's an open question about the brand's own numbers, such as inch and centimetre columns that disagree. The calculator explains it under the result and uses the values stated there.

Centimetres are shown as the brand prints them; where a brand prints only inches they are converted and marked "≈". Brands change their charts, so check the retailer's page before you buy. Read more in How we check sizes.