Shoe Size
Conversion
Convert shoe sizes instantly between US, UK, EU, and CM for men, women, and kids. Includes full size charts and a foot measurement guide.
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Shoe Size Converter
US, UK, EU & CM sizing
Enter your size above to convert it instantly.
SIZE REFERENCE
Complete Shoe Size Charts
US, UK, EU, CM — men, women, and kids in one place.
| US (Men) | UK | EU | CM | Inches |
|---|---|---|---|---|
| 6 | 5.5 | 38.5 | 24 | 9.4" |
| 6.5 | 6 | 39 | 24.5 | 9.6" |
| 7 | 6.5 | 40 | 25.4 | 9.8" |
| 7.5 | 7 | 40.5 | 25.4 | 10" |
| 8 | 7.5 | 41 | 25.9 | 10.2" |
| 8.5 | 8 | 42 | 26.3 | 10.4" |
| 9 | 8.5 | 42.5 | 26.7 | 10.5" |
| 9.5 | 9 | 44 | 27.5 | 10.7" |
| 10 | 9.5 | 44 | 27.5 | 10.8" |
| 10.5 | 10 | 44.5 | 27.9 | 11" |
| 11 | 10.5 | 45 | 28.4 | 11.1" |
| 11.5 | 11 | 45.5 | 28.6 | 11.3" |
| 12 | 11.5 | 46 | 29 | 11.4" |
| 12.5 | 12 | 47 | 29.8 | 11.7" |
| 13 | 12.5 | 48 | 30.5 | 12" |
| 14 | 13.5 | 49 | 31.5 | 12.3" |
MEASUREMENT GUIDE
How to Measure Your Foot at Home
4 steps for the most accurate shoe size.
Trace on paper
Place a sheet of paper on a hard floor (not carpet). Stand on it and trace around your foot with a pencil held straight up and down.
Measure in the afternoon
Feet swell slightly throughout the day. Measure in the afternoon or evening for the most accurate fit, especially for athletic shoes.
Measure heel to toe
Find the longest straight-line distance from the back of your heel to the tip of your longest toe — it isn't always the big toe.
Use the larger foot
Most people have one foot that's slightly larger than the other. Measure both and size your shoes to the larger foot for comfort.
Brand Sizing Varies
Sizing charts are an industry average, not a guarantee. Nike commonly runs about half a size large across many models, while New Balance and ASICS tend to run true to size. Always check a brand's own size chart before buying — especially when shopping online without trying shoes on first.
Men vs Women Sizing
US men's and women's shoe sizes differ by 1.5 for the same foot length. A women's US 7.5 equals a men's US 6. This matters when shopping cross-gender or converting a size found on an international site.
Example conversions: W8.5 → M7 · W9 → M7.5 · W10.5 → M9 · W11.5 → M10. If you're buying men's shoes as a woman, subtract 1.5 up.
What is a Half Size?
A half shoe size represents approximately one-sixth of an inch (about 4mm) of additional foot length — if you measure between two whole sizes, always round up to the next half size, never down.
Width also matters: US shoes come in widths Narrow (2A/N), Medium (B for women, D for men), Wide (D for women, 2E for men), and Extra Wide (2E/EE for women, 4E for men).
| Shoe Size Conversion — Complete Guide
Shoe sizing is one of the most confusing aspects of buying footwear, especially when shopping internationally. The US, UK, EU, and Asian sizing systems are all different, and even within a single system, brands can vary significantly. This guide explains how each system works, how conversions are calculated, and how to find your most accurate size from a foot measurement.
Our free shoe size converter handles men's, women's, and kids' sizes across all four major systems: US, UK, EU, and CM (foot length in centimeters). Enter your size and instantly see the equivalent in all other systems.
| How Shoe Size Systems Work
US Shoe Sizing
The US sizing system uses separate scales for men, women, and children. Men's and women's scales use the same numbering but represent different foot lengths — a men's US 8 is about 24cm while a women's US 8 is about 24.5cm. Children's sizes run from 0 (newborn) to about 13.5 before transitioning into adult sizing.
UK Shoe Sizing
UK sizing is similar to US but offset by different amounts for men and women. Men's UK sizes run about 0.5 less than US (US 10 = UK 9.5). Women's UK sizes run about 2 less than US (US 8 = UK 6), which is where most cross-Atlantic sizing confusion comes from.
EU Shoe Sizing
European sizing uses a single continuous scale that doesn't separate men's and women's numbers. EU sizes are based on the Paris Point system, where each whole size equals two-thirds of a centimeter of internal shoe length. To convert US men's to EU, add approximately 33. For US women's to EU, add approximately 31. EU sizing is used across continental Europe and is generally the most precise system for cross-country shopping.
CM Sizing (Japan & Korea)
Japan and South Korea use foot length in centimeters as the primary sizing system. This is the most universal and accurate figure since it doesn't require separate men's/women's scales — a foot length is a foot length. A 26.5cm foot is a 26.5cm foot regardless of gender. When buying from Japanese labels like Asics, Onitsuka Tiger, or Korean brands, CM sizing is your most reliable reference.
Approximate EU Conversion Formulas
EU from US (Men): US + 33 (e.g. US 10 → EU 43)EU from US (Women): US + 31 (e.g. US 8 → EU 39)US (Men): CM × 0.65 − 6 (e.g. 28 cm → US 10.5)US (Women): CM × 0.65 − 4.5 (e.g. 24 cm → US 9)CM foot length: EU × 0.667 (approximately)
| Tips for Buying Shoes Online
Always Use Foot Length, Not Just Size
The most accurate way to buy shoes online is to know your foot length in centimeters and compare it to the brand's size chart. Size charts that show CM or mm ranges eliminate the ambiguity of regional sizing differences entirely.
Check Brand-Specific Fit Notes
Shoes generally run half a size large — many shoppers size down. Converse (especially Chuck Taylors) run half a size small — size up. New Balance, ASICS, and Brooks tend to be true to size. Adidas varies by model — the UltraBoost line runs slightly large while the Stan Smith is typically true to size.
Consider Shoe Width
Length is only half the equation. If shoes feel tight across the ball of the foot even in the right length, you may need a wider width. US widths range from 2A (narrow) through 4E (extra-wide). Many brands offer standard width only — look for brands like New Balance, Brooks, or Keen if width is a concern.
Athletic Shoes vs Dress Shoes
Athletic shoes (running, basketball, training) should have a thumb's width of space between your longest toe and the end of the shoe to accommodate foot swelling during activity. Dress and leather shoes are typically worn with less room and may feel snug at first but stretch slightly with wear.
— FAQ