Are Nike True to Size?
May 28, 2025
Photo by Danilo Capece on Unsplash
As the world’s most iconic and widely owned footwear brand, Nike sets the benchmark for style with its sneakers, running shoes, and athletic wear. However, finding the right Nike size online can be challenging due to subtle differences compared to other brands. This guide will help you find your perfect Nike size for men’s and women’s shoes, whether you’re after performance sneakers or casual classics. For expert tips on online sizing, explore our Three strategies to get the right shoes when buying online. Curious about the most popular brands? Check out the Shoe trends for 2025, most owned and searched.
Nike Women's Sizing Comparison
Women’s Nike shoes have a distinct sizing pattern compared to other popular brands. The table below provides a general guide to how they align with Adidas, Asics, and New Balance. Due to variations across styles, we strongly recommend using our sizing tool for a precise fit. Learn more in our Why Your Shoe Size Varies Between Brands (And How to Find the Perfect Fit Every Time).
| Compared to... | US Size | UK Size | EU Size |
|---|---|---|---|
| Adidas | Runs ½ size larger | Runs ½ size smaller | Same fit |
| Asics | Same fit | Runs ½ size smaller | Same fit |
| New Balance | Same fit | Runs ½ size smaller | Same fit |
Nike Women's Size Conversion Chart
| US Size | UK Size | EU Size |
|---|---|---|
| 4 | 1.5 | 34.5 |
| 4.5 | 2 | 35 |
| 5 | 2.5 | 35.5 |
| 5.5 | 3 | 36 |
| 6 | 3.5 | 36.5 |
| 6.5 | 4 | 37.5 |
| 7 | 4.5 | 38 |
| 7.5 | 5 | 38.5 |
| 8 | 5.5 | 39 |
| 8.5 | 6 | 40 |
| 9 | 6.5 | 40.5 |
| 9.5 | 7 | 41 |
| 10 | 7.5 | 42 |
| 10.5 | 8 | 42.5 |
| 11 | 8.5 | 43 |
| 11.5 | 9 | 44 |
| 12 | 9.5 | 44.5 |
| 12.5 | 10 | 45 |
| 13 | 10.5 | 45.5 |
| 13.5 | 11 | 46 |
| 14 | 11.5 | 47 |
| 14.5 | 12 | 47.5 |
| 15 | 12.5 | 48 |
| 15.5 | 13 | 48.5 |
| 16 | 13.5 | 49 |
| 16.5 | 14 | 50 |
| 17 | 14.5 | 50.5 |
| 17.5 | 15 | 51 |
| 18 | 15.5 | 51.5 |
| 18.5 | 16 | 52 |
| 19 | 16.5 | 52.5 |
| 19.5 | 17 | 53 |
| 20 | 17.5 | 53.5 |
| 20.5 | 18 | 54 |
| 21 | 18.5 | 54.5 |
| 21.5 | 19 | 55 |
| 22 | 19.5 | 55.5 |
| 22.5 | 20 | 56 |
Need help with international sizing? Explore our Understanding Shoe Sizing: A Complete Guide to US, UK, and EU Standards for more clarity.
Nike Men's Sizing Comparison
Men’s Nike shoes follow a unique sizing pattern compared to other brands. The table below offers a general guide to how they align with Adidas, Asics, and New Balance. As fit may vary across styles, we strongly recommend using our sizing tool for an accurate fit. For more insights, refer to our Why Your Shoe Size Varies Between Brands (And How to Find the Perfect Fit Every Time).
| Compared to... | US Size | UK Size | EU Size |
|---|---|---|---|
| Adidas | Same fit | Runs ½ size smaller | Same fit |
| Asics | Same fit | Same fit | Same fit |
| New Balance | Same fit | Runs ½ size smaller | Same fit |
Nike Men's Size Conversion Chart
| US Size | UK Size | EU Size |
|---|---|---|
| 3.5 | 3 | 35.5 |
| 4 | 3.5 | 36 |
| 4.5 | 4 | 36.5 |
| 5 | 4.5 | 37.5 |
| 5.5 | 5 | 38 |
| 6 | 5.5 | 38.5 |
| 6.5 | 5.99 | 39 |
| 7 | 6.01 | 40 |
| 7.5 | 6.5 | 40.5 |
| 8 | 7 | 41 |
| 8.5 | 7.5 | 42 |
| 9 | 8 | 42.5 |
| 9.5 | 8.5 | 43 |
| 10 | 9 | 44 |
| 10.5 | 9.5 | 44.5 |
| 11 | 10 | 45 |
| 11.5 | 10.5 | 45.5 |
| 12 | 11 | 46 |
| 12.5 | 11.5 | 47 |
| 13 | 12 | 47.5 |
| 13.5 | 12.5 | 48 |
| 14 | 13 | 48.5 |
| 14.5 | 13.5 | 49 |
| 15 | 14 | 49.5 |
| 15.5 | 14.5 | 50 |
| 16 | 15 | 50.5 |
| 16.5 | 15.5 | 51 |
| 17 | 16 | 51.5 |
| 17.5 | 16.5 | 52 |
| 18 | 17 | 52.5 |
| 18.5 | 17.5 | 53 |
| 19 | 18 | 53.5 |
| 19.5 | 18.5 | 54 |
| 20 | 19 | 54.5 |
| 20.5 | 19.5 | 55 |
| 21 | 20 | 55.5 |
| 21.5 | 20.5 | 56 |
| 22 | 21 | 56.5 |
For more international sizing guidance, consult our Understanding Shoe Sizing: A Complete Guide to US, UK, and EU Standards.
Get Your Perfect Nike Fit
While these size charts and brand comparisons offer helpful guidance, individual fit may vary based on foot width, arch type, and intended use. Consider factors like sock thickness and whether you'll be using orthotics when choosing your size. If you're exploring other brands, check out sizing guides for Hoka, Dr. Martens, Salomon, Puma, Crocs, and Blundstone for comparisons.
For the most precise sizing recommendation tailored to your unique needs, use our specialized sizing tool below to find your perfect Nike fit. Also, learn how to measure your foot accurately with our How to Measure Your Foot to Find the Right Shoe Size.
Frequently Asked Questions
Are Nike shoes true to size?
Nike shoes generally align with many brands but vary by model. Women's Nike shoes run half a size larger than Adidas in US sizes, match Asics and New Balance in US and EU sizes, and run half a size smaller than Adidas, Asics, and New Balance in UK sizes. Men's Nike shoes match Adidas, Asics, and New Balance in US and EU sizes, match Asics in UK sizes, and run half a size smaller than Adidas and New Balance in UK sizes. Use our sizing tool for accuracy.
How do Nike women's sizes compare to other brands?
Women's Nike shoes run half a size larger than Adidas in US sizes, match Asics and New Balance in US and EU sizes, and run half a size smaller than Adidas, Asics, and New Balance in UK sizes. Due to style variations, use our sizing tool for a precise fit.
How do Nike men's sizes compare to other brands?
Men's Nike shoes match Adidas, Asics, and New Balance in US and EU sizes, align with Asics in UK sizes, and run half a size smaller than Adidas and New Balance in UK sizes. To ensure accuracy across styles, use our sizing tool.
How can I find the perfect Nike shoe size?
To find your perfect Nike size, consider foot width, arch type, and intended use, along with sock thickness or orthotics. Use our specialized sizing tool for a personalized size recommendation tailored to your needs.