← SneakerFrenzyBlog

Nike Shoe Size Chart

Nike sizing matches standard US/EU/UK scale. Use the chart below to find your size in any system.

How Nike Sizing Actually Works

Nike uses the same numerical scale as most American brands, but the fit isn't uniform across its own lineup. A size 10 in a Pegasus and a size 10 in an Air Force 1 can feel like two different shoes, because Nike builds each silhouette's last — the foot-shaped mold a shoe is built around — for how that shoe is meant to be worn, not around one fixed standard.

Running shoes vs. lifestyle shoes

Nike's performance running line — Pegasus, Vomero, Invincible, Structure — is built on a narrower, more secure last designed to lock the foot down during motion. Most runners find these true to size, though anyone who runs long distances or has wider feet often goes up half a size to leave room for foot swelling. Lifestyle silhouettes like the Air Force 1, Air Max 90 and Dunk Low use a roomier, flatter last built for all-day wear rather than performance, which is why they tend to feel slightly generous even at your usual size.

Kids' Nike sizing codes

Nike splits kids' sizing into three separate ranges rather than one continuous scale, and the labels matter more than most parents realize: TD (Toddler, roughly US baby sizes 2–10), PS (Preschool, US 10.5–3), and GS (Grade School, US 3.5–7). A GS size isn't simply a smaller adult size — it's cut on its own last, so a “GS 6” and a men's “6” in the same silhouette won't always fit identically.

Half sizes and width

Nike doesn't offer width options on most models sold outside its Nike By You customization program, so if you have wide feet, going up half a size is usually the more reliable fix than hunting for a wide fit. Nike By You shoes use the same base last and sizing as the equivalent retail model, so your regular Nike size still applies.

Sizing changes between shoe generations

Because Nike doesn't lock every silhouette to one last forever, the fit of a single model can shift between yearly updates — the Pegasus 41, for example, added extra room in the toe box compared with the Pegasus 39 and 40. If you're replacing an older pair with the newest version of the same shoe, it's worth checking recent reviews for that specific release rather than assuming your fit carried over automatically.

Sneaker Size Converter

Find your perfect fit across every sizing system, instantly. Convert between US, UK, EU, CM and Korean sizing for men, women and kids — with brand-specific fit guides for Nike, Adidas, Jordan and more.

Men's Sneaker Size Converter

Select your size system, pick your size, and every equivalent appears instantly.

I know my size in
Select your size
US—
UK—
EU—
CM—
Korean—
Enter your foot length above for a size recommendation.

⚠ Sizing varies between brands and styles. These conversions are a guide — always check the brand's own size chart before buying.

Women's Sneaker Size Converter

Select your size system, pick your size, and every equivalent appears instantly.

I know my size in
Select your size
US—
UK—
EU—
CM—
Korean—
Enter your foot length above for a size recommendation.

⚠ Sizing varies between brands and styles. These conversions are a guide — always check the brand's own size chart before buying.

Kids' Shoe Size Converter

Choose an age category, then select your size system for instant conversions across US, UK and EU.

Age category
I know my size in
Select your size
US—
UK—
EU—
CM—
Enter your child's foot length above for a size recommendation.

⚠ Kids' feet grow fast — measure regularly and always allow a little extra room. Check the brand's own chart before buying.

Sneaker Brand Size Guide

Not all sneakers fit the same. Here's how the major brands run relative to your true size — so you know before you buy. We've noted which specific models are affected and how much to adjust.

Brand Fit Adjustment Notes
Nike True to Size None needed Generally TTS across most styles. Air Force 1 fits slightly roomy. React and Pegasus running shoes can run narrow — wide-footer types should consider half a size up.
Adidas Runs Small Go ½ size up Ultraboost and NMD run about half a size small. Stan Smith and Gazelle are TTS but fit narrow — if you have wider feet, go half a size up. Yeezy sizing varies by model.
New Balance True to Size None needed TTS with excellent width options (B through 4E). Known for a comfortable, slightly roomier toe box than Nike. 990, 574 and 550 are all reliably TTS.
Jordan True to Size None needed Most Jordan models are TTS. Air Jordan 1 fits wide and roomy — narrow-foot types can size down half. Jordan 11 runs a touch large; some people prefer half a size down.
Vans Runs Large Go ½ size down Old Skool and Sk8-Hi run slightly long — go half a size down if between sizes. Canvas styles stretch a little with wear. Slip-ons tend to feel roomy, so size down more confidently.
Converse Runs Very Large Go 1–1.5 sizes down Chuck Taylors are famous for running big. Men should go 1 to 1.5 sizes down. Women should go down 2 full sizes (they use unisex sizing). The roomy toe box gets roomier as the canvas breaks in.
Puma True to Size None needed Suede Classic and RS models are reliably TTS. Puma fits slightly narrow across most styles — wider feet may prefer to go half a size up for comfort on longer wear days.
Reebok True to Size None needed Classic Leather and Club C are TTS. Reebok generally fits well across widths. Instapump Fury runs slightly narrow. Classics tend to have a slightly roomier toe box than running styles.

Fit notes reflect general fit across popular models and community feedback. Individual styles may vary. Always check the specific product page for fit recommendations before purchasing.

Sneaker Sizing — Frequently Asked Questions

How do I convert US shoe sizes to EU? +
To convert US men's sizes to EU, add roughly 33 to your US size — so a US 10 is approximately EU 44. For women, add about 31 to your US size, so a US 8 is around EU 38.5. The easiest approach is to use the converter above, which gives you the exact EU equivalent for your size instantly.
What is my shoe size in CM? +
Your shoe size in CM refers to the length of your foot in centimetres. You can measure it by standing on a piece of paper, tracing around your foot and measuring from heel to the tip of your longest toe. A US men's 10 is approximately 28cm, and a US women's 8 is approximately 25cm. Use the foot length helper in the converter above for an instant size recommendation.
Do Nike shoes run true to size? +
Nike shoes generally run true to size, but fit can vary by model. Running shoes like the Pegasus and React Infinity tend to be accurate to your normal size, while lifestyle styles like the Air Force 1 can feel slightly roomy. If you're between sizes in Nike, most people are comfortable going half a size down.
What is the difference between men's and women's shoe sizing? +
Men's and women's shoe sizes use different numbering systems even though they can refer to the same foot lengths. A women's US 8 is roughly equivalent to a men's US 6.5 — women's sizes run about 1.5 sizes larger than men's for the same foot. Women's shoes are also typically made on a narrower last, which matters when buying unisex or crossover styles.
How do I convert kids' shoe sizes to adult sizes? +
Big kids' sizes (Y) run up to a US 7Y, which is close to a US 7 in women's or a US 5.5 in men's. Kids' sizes and adult women's sizes overlap closely — a kids' 5Y is roughly a women's US 6.5. If you have wide feet, adult sizing is usually a better option since it comes in more width choices than kids' shoes.
What shoe size is EU 42 in US? +
EU 42 is a US men's 8.5 or a US women's 11, depending on the gender sizing chart you're using. EU sizes use the same number across men's and women's but the equivalent US size differs between the two. Use the converter above to check both conversions instantly.
Do Converse run big or small? +
Converse sneakers are well known for running big — most people go 1 to 1.5 sizes down from their usual size. The classic Chuck Taylor has a roomy toe box and uses unisex sizing, so women typically need to go down 2 full sizes compared to their normal women's size. If you're a US men's 10 in most brands, start with a Converse 9.

Frequently Asked Questions

Do Nike shoes fit true to size?

Most Nike running and lifestyle models run true to size, but fit varies more by shoe type than by the Nike brand as a whole. Running shoes like the Pegasus are built on a narrower, snugger last, while lifestyle shoes such as the Air Force 1 use a roomier last and tend to feel slightly generous even at your usual size.

What is Nike US 10 in EU?

Nike US Men's 10 converts to EU 44, and a US Women's 10 converts to roughly EU 41.5. Use the converter above if you need the exact UK or CM equivalent too.

Is Nike sizing consistent across models?

The size numbering itself is consistent, but the fit isn't — a size 9 basketball shoe, a size 9 trail runner and a size 9 slip-on can all fit differently because each is built on its own last for its specific use. It's worth checking recent buyer reviews for the exact model rather than assuming your usual Nike size applies everywhere.

How do men's and women's Nike sizes differ?

Women's Nike sizes run about 1.5 sizes smaller in number than the equivalent men's size for the same foot length, so a men's US 8 is close to a women's US 9.5. Some Nike models are sold only in men's sizing, in which case women typically size down by 1.5 from their normal women's size.

What are Nike's kids' size codes (TD, PS, GS)?

TD is Toddler (roughly US baby sizes 2 to 10), PS is Preschool (US 10.5 to 3), and GS is Grade School (US 3.5 to 7). Each range uses its own last rather than being a simple scaled-down version of the adult shoe.

Should I size up on Nike running shoes?

Many runners go half a size up from their usual Nike size, particularly for long-distance models, to leave room for feet swelling during a run. If you're between sizes or have wider feet, sizing up is usually more reliable than expecting the shoe to stretch.