Shoe Size Converter | 6 Countries Instant Conversion

  • Adam
  • November 3, 2025

Free international shoe size converter. Instantly convert between US, UK, EU, Japan, Mexico, China sizes. Calculate with foot length in cm or inches. All categories supported.

👟 Shoe Size Conversion Calculator

Convert Shoe Sizes Between All Countries

6 Countries • Accurate Conversion

Conversion Result

Input Size:
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Converted Size:
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Foot Length (cm):
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Foot Length (inches):
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All Size Conversions

Shoe Size Conversion Guide

Shoe sizes vary significantly across countries due to different measurement systems and standards. This calculator helps you convert between the most popular sizing systems worldwide.

⚠️ Important Note: Shoe size conversions are estimates based on foot length. Actual shoe sizes can vary by manufacturer, shoe style, brand, and shoe construction. Always try on shoes before purchasing when possible.

Shoe Size Systems Explained

US/Canada System

The US and Canada use half-size increments. Women's sizes typically range from 1-15, men's from 1-14.

Women's Shoe Size ≈ (3L - 21) where L = foot length in inches
Men's Shoe Size ≈ (3L - 22) where L = foot length in inches

UK/India System

Similar to US but with a different baseline. Used in the United Kingdom and India.

Adult Shoe Size ≈ (3L - 23) where L = foot length in inches

European (EU) System

Uses whole-point increments. The most standardized system within the EU.

Shoe Size = (3L/2 + 2) where L = foot length in centimeters

Japan/Mexico System

Uses foot length in centimeters directly, with half-point increments in some cases.

Shoe Size = L where L = foot length in centimeters

China System

Uses a unique formula based on centimeters.

Shoe Size = (2L - 10) where L = foot length in centimeters

Category Differences

Adults

Standard shoe sizes for adult women and men, typically ranging from size 1 to 15 (depending on the system).

Kids (Age 5-12)

Children's sizes that differ from adult sizing, typically starting from size 0-1 and going up to size 7.

Infants/Toddlers (Age 0-4)

Very small sizes for babies and young toddlers, typically starting from size 0 and going up to size 10.

How Foot Length Affects Shoe Size

Foot length is the primary measurement determining shoe size. It's measured from the heel to the longest toe. Different countries use different formulas to convert this measurement into shoe sizes.

Measurement Devices:

  • Brannock Device: The most common professional foot measuring device, providing three key measurements (foot length, width, and arch length)
  • RITZ Stick: A wooden slide ruler with shoe size conversions on the opposite side
  • Mondopoint System: Uses metric measurements (centimeters)

Quick Reference: Shoe Size Chart

Women's Shoes - Size Conversion

US/CA UK/IN EU JP/MX CN Foot Length (cm)
5 3 35 22 34 22.0
6 4 36 23 36 22.9
7 5 38 23.5 37 23.7
8 6 39 24.5 39 24.6
9 7 40 25.5 41 25.4
10 8 41 26 42 26.2
11 9 43 27 44 27.1

Men's Shoes - Size Conversion

US/CA UK/IN EU JP/MX CN Foot Length (cm)
7 6 39 24.5 39 24.6
8 7 40 25.5 41 25.4
9 8 41 26 42 26.2
10 9 43 27 44 27.1
11 10 44 28 46 27.9
12 11 45 29 48 28.8
13 12 46 29.5 49 29.6

Frequently Asked Questions

Why do shoe sizes vary so much between countries?
Shoe sizes have different standards because shoe-making existed long before mass production and standardization. Different countries developed their own measurement systems, and it's been difficult to change these ingrained traditions. There are also differences in how foot length is converted to shoe size.
What's the most accurate way to measure foot length?
The Brannock device is the gold standard for foot measurement. It measures three key factors: foot length, width, and arch length. Stand barefoot, heel against the back bar, and have someone measure where your longest toe reaches on the measuring scale.
Are shoe size conversions exact?
No. These conversions are estimates based on average foot length. Actual shoe sizes can vary by manufacturer, brand, shoe style, and construction. Always try on shoes when possible, as width, material, and arch support also affect fit.
What's the difference between men's and women's shoe sizes?
Men's and women's shoe sizes use different formulas and baselines. Women's US size 8 is roughly equivalent to men's US size 6.5, and they have different width standards and proportions.
How do children's shoe sizes work?
Children's sizes are separate from adult sizes and vary by age group. Toddlers (0-4) and kids (5-12) have their own sizing systems that don't directly correspond to adult sizes, as their feet are growing and proportions are different.
Should I buy bigger shoes for my child?
It's recommended to leave about a thumb's width (roughly 1/2 inch or 1 cm) of space at the toe, but not too much. Too much extra space can cause blisters and affect development, while too tight shoes restrict growth.
What's the EU system, and why is it different?
The EU system uses the Mondopoint system based on foot length in millimeters. It's more standardized than many other systems because the EU tried to create a unified sizing standard. Sizes increase in whole-point increments.
Can I use this calculator for all shoe types?
This calculator provides a base conversion based on foot length. However, different shoe types (athletic shoes, formal shoes, sandals) may have different fits even in the same size. Fashion boots and specialty footwear may also fit differently.
Why are my US and UK sizes different?
The UK and India use a different baseline calculation than the US. A US women's size 8 roughly equals a UK/India size 6, but not exactly. The UK system subtracts a different number in the conversion formula.
What if my feet are different sizes?
It's normal for feet to be slightly different sizes. Always buy shoes to fit your larger foot. You can use insoles or socks in the other shoe if needed. When measuring, measure both feet and use the larger measurement.

Official Shoe Sizing Standards & References

All shoe size data sourced from official sizing standards and footwear organizations:

📏 ISO 9407 - Shoe Sizing Standards 👟 ASTM F494 - Standard Practices for Shoe Sizing 📚 Wikipedia - Comprehensive Shoe Size Information 👞 Clarks Shoes - Professional Size Guide 🏃 Foot Locker - Detailed Shoe Size Charts 🌍 Mondopoint - International Shoe Sizing System

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