Shoe Size Conversion
Convert shoe sizes between US, Canada, UK, India, EU, Japan, Mexico, and China sizing systems for adults, kids, and infants.
Shoe Size Conversion Chart
Browse conversion charts for women, men, kids, and infants. Each chart maps US/Canada, UK/India, EU, Japan/Mexico, and China sizes alongside foot length in cm and inches.
The men's shoe size chart below covers US Men's sizes 6 through 14 with equivalent UK/India, EU (European), Japan/Mexico, and China (CN) shoe sizes. Foot length is shown in centimeters (cm) and inches.
Men's Shoe Size Conversion Chart
| US/CA | UK/IN | EU | JP/MX | CN | Inches | cm |
|---|---|---|---|---|---|---|
| 6 | 5 | 38 | 23.5 | 37 | 9.3 | 23.7 |
| 6.5 | 5.5 | 38 | 24 | 38 | 9.5 | 24.1 |
| 7 | 6 | 39 | 24.5 | 39 | 9.7 | 24.6 |
| 7.5 | 6.5 | 39 | 25 | 40 | 9.8 | 25 |
| 8 | 7 | 40 | 25.5 | 41 | 10 | 25.4 |
| 8.5 | 7.5 | 41 | 26 | 42 | 10.2 | 25.8 |
| 9 | 8 | 41 | 26 | 42 | 10.3 | 26.2 |
| 9.5 | 8.5 | 42 | 26.5 | 43 | 10.5 | 26.7 |
| 10 | 9 | 43 | 27 | 44 | 10.7 | 27.1 |
| 10.5 | 9.5 | 43 | 27.5 | 45 | 10.8 | 27.5 |
| 11 | 10 | 44 | 28 | 46 | 11 | 27.9 |
| 11.5 | 10.5 | 45 | 28.5 | 47 | 11.2 | 28.4 |
| 12 | 11 | 45 | 29 | 48 | 11.3 | 28.8 |
| 12.5 | 11.5 | 46 | 29 | 48 | 11.5 | 29.2 |
| 13 | 12 | 46 | 29.5 | 49 | 11.7 | 29.6 |
| 13.5 | 12.5 | 47 | 30 | 50 | 11.8 | 30.1 |
| 14 | 13 | 48 | 30.5 | 51 | 12 | 30.5 |
Shoe Size Conversion Formulas
Every sizing system uses its own formula to translate foot length into a size number. Below are the five formulas our converter relies on.
US and Canada Shoe Size Formula
where L is foot length in inches. The US and Canada shoe size formula uses the Brannock device with half-point increments.
UK and India Shoe Size Formula
where L is foot length in inches. The UK and India shoe size formula uses the Brannock shoe size system with offset 23 for adults. UK and India shoe sizes are unisex with half-point increments.
EU Shoe Size Formula
where L is foot length in centimeters. The EU shoe size formula uses the Paris Point system (1 Paris Point = ⅔ cm). European shoe sizes are unisex with whole-number increments only.
Japan and Mexico Shoe Size Formula
where L is foot length in centimeters. The Japan and Mexico shoe size formula uses the Mondopoint shoe sizing system (ISO 9407). Japan and Mexico shoe sizes are unisex with half-point (0.5 cm) increments.
China Shoe Size Formula
where L is foot length in centimeters. The China (CN) shoe size formula doubles foot length and subtracts 10. China shoe sizes are unisex with whole-point increments.
How to Use the Shoe Size Conversion Calculator
Pick a category, enter one size or measurement, and press Convert. The calculator fills in all other systems automatically.
Select Adults, Kids, or Infants
Choose Adults, Kids (age 5–12), or Infants (age 0–4) at the top of the shoe size conversion calculator.
Enter Your Shoe Size
Type your known shoe size into the matching field: US/Canada Women, US/Canada Men, UK/India, EU (European), Japan/Mexico, or China (CN). Half sizes are accepted.
Enter Your Foot Length
Enter your foot length measurement directly, if you know your foot length from a ruler, Brannock Device, or foot-measuring tool.
Choose Inches or Centimeters
Select centimeters (cm), millimeters (mm), or inches from the foot length dropdown.
Click Convert
Press the Convert button or press Enter on your keyboard to calculate the shoe size conversion instantly.
Understand Your Conversion Results
Results show your shoe size in all 6 systems (US/Canada Women, US/Canada Men, UK/India, EU, Japan/Mexico, China) plus foot length in cm, mm, and inches.
Foot Measurement and Shoe Size
Foot measurement determines shoe size across all sizing systems, including US, UK, EU, Japan, Mexico, and China.
How to Measure Your Foot
To measure your foot for shoe size, place paper on a hard floor against a wall, stand with your heel touching the wall, mark the tip of your longest toe, and measure the distance in centimeters (cm), millimeters (mm), or inches.
Measure both feet and use the larger foot measurement. A foot length of 25 cm (9.8 inches, 250 mm) converts to approximately US Women's size 8.5, and 27 cm (10.6 inches, 270 mm) converts to approximately US Men's 10.
Foot Length to Shoe Size
To convert foot length to shoe size, measure your foot in centimeters (cm) or inches and apply the shoe size conversion formula: US Men's = 3 × foot length in inches − 22. US Women's = 3 × foot length in inches − 21. UK = 3 × foot length in inches − 23. EU = 1.5 × foot length in cm + 2. Japan/Mexico = foot length in centimeters.
For example, a foot length of 27 cm (10.6 inches, 270 mm) converts to US Men's 10, US Women's 11, UK 9, EU 43, Japan/Mexico 27, and China 44.
Shoe Size to Foot Length
To convert shoe size to foot length, reverse the shoe size conversion formula: US Men's: foot length in inches = (US size + 22) ÷ 3. US Women's: (US size + 21) ÷ 3. UK: (UK size + 23) ÷ 3. EU: foot length in cm = (EU size − 2) ÷ 1.5. Japan/Mexico: shoe size = foot length in cm.
For example, US Men's 10 = 10.67 inches (27.1 cm, 271 mm), US Women's 8 = 9.67 inches (24.6 cm, 246 mm).
Shoe Size in Inches, Centimeters, and Millimeters
Shoe size is based on foot length in 3 units: inches, centimeters (cm), and millimeters (mm). Conversion: 1 inch = 2.54 cm = 25.4 mm.
US, Canada, UK, and India use foot length in inches (Brannock device). EU uses Paris Points (1 Paris Point = ⅔ cm). Japan, Mexico, and China use foot length in centimeters directly.
Shoe Size Measurement Systems
Shoe sizing worldwide relies on two main measuring devices and several regional formulas. Here is how they compare.
Brannock Device
The Brannock device is the standard shoe size measurement tool in the US, Canada, UK, and India. The Brannock shoe size system measures 3 foot dimensions: foot length (heel to toe), arch length (heel to metatarsophalangeal joints), and foot width.
RITZ Stick
The RITZ Stick is an early American wooden foot-measuring device (patented 1916) that predates the Brannock Device. It has a fixed heel block and a sliding toe block, and is turned 90° to measure foot width.
Mondopoint Shoe Sizing
The Mondopoint system (ISO 9407) is the international standard for shoe sizing, measuring foot length and foot width in millimeters (mm). Used in Japan, Mexico, South Korea, Taiwan, and Russia, and for ski boots, skates, and ballet shoes.
Compare Shoe Size Measurement Systems
Measuring Devices
| Feature | Brannock Device | RITZ Stick |
|---|---|---|
| Type | Metal foot-measuring device | Wooden foot-measuring stick |
| Measures | Length, Arch, Width | Length, Width |
| Origin | USA (1927) | USA (patented 1916) |
| Unit | Inches / Barleycorns | Inches |
Sizing Systems
| Feature | Brannock (US/UK) | Paris Point (EU) | Mondopoint (ISO) | Chinese (CN) |
|---|---|---|---|---|
| Unit | Barleycorns (⅓ in) | Paris Points (⅔ cm) | Millimeters | Centimeters × 2 − 10 |
| Regions | US, Canada, UK, India | EU (Europe) | Japan, Mexico, South Korea, Taiwan | China |
| Sizing Type | Gendered (Men/Women) | Unisex | Unisex | Unisex |
| Standard | Industry standard (US) | Regional standard (EU) | Global standard (ISO 9407) | National standard (China) |
Factors That Affect Shoe Fit
Foot length drives sizing, but six other variables determine whether a shoe actually fits well.
Foot Length
Foot length is measured from the heel to the longest toe and is the primary shoe sizing factor. A 4.23 mm (0.17 inch) difference equals one half-size in US/Canada and UK/India shoe sizing systems.
Foot Width
Foot width is measured at the ball of the foot (metatarsophalangeal joints). Shoe width ranges from AAA (narrow) to EEE (extra wide). Standard shoe width is B for women and D for men. Foot circumference and heel width also affect shoe fit.
Foot Shape
The 3 common foot shapes are Egyptian (big toe longest), Greek (second toe longest), and Roman (first 3 toes equal). The shoe last shape in shoe construction determines how the shoe design matches each foot shape.
Men's and Women's Shoe Differences
US/Canada Women's shoe sizes are 1.5 sizes larger than US/Canada Men's for the same foot length (e.g., US Women's 9.5 = US Men's 8). UK/India, EU, Japan, Mexico, and China (CN) shoe sizes are unisex.
Age and Foot Changes
Adult foot size can change over time. Feet may swell somewhat during the day, so measuring in the evening can give a more accurate fit. Infant and toddler shoe sizes change frequently — children's shoe size should be re-measured every 2–3 months.
Brand and Manufacturer Differences
Sizes vary between manufacturers because of differences in last shape, construction technique, and design intent. A size 10 from one brand may fit quite differently from another. Always consult the brand's own chart before ordering.
How to Measure and Choose the Right Shoe Size
Follow these practical steps to measure accurately and pick the right size every time.
Measure Both Feet
Measure both feet for foot size measurement. Most people's left and right foot differ by 1–3 mm (0.04–0.12 inches). Stand with full body weight during measurement.
Use the Larger Foot
Pick the shoe size that fits your larger foot. Go half a shoe size up, if the foot length falls between 2 sizes.
Measure Your Feet at the Right Time
Measure foot size in the evening because feet tend to swell during the day. Wear the socks you plan to use with the shoes.
Consider Shoe Width
Standard shoe width is B for women's shoes and D for men's shoes. Shoe width ranges from AAAA (narrowest) to EEEE (widest).
Check the Brand's Size Chart
Check the shoe brand's shoe size chart before ordering because shoe sizing varies across shoe brands and shoe manufacturers.
Try Shoes Before Buying
Try shoes on both feet for proper shoe fit. Leave ~1 cm (10 mm, 0.39 inches) between your longest toe and the front of the shoe.
Frequently Asked Questions
Quick answers to the most common questions about converting between sizing systems, measuring feet, and getting a good fit.
What is shoe size conversion?
Shoe size conversion is the process of translating a shoe size from one international sizing system to another. There are 6 major shoe sizing systems: US/Canada (Brannock), UK/India (Brannock), EU (Paris Point), Japan/Mexico (Mondopoint), China (CN), and Russia. Each shoe sizing system uses a different shoe size conversion formula based on foot length. The shoe size conversion calculator on this page converts between all 6 systems using verified mathematical formulas.
How do I convert US shoe size to UK?
Subtract 1 from the US Men's shoe size to get the UK shoe size (e.g., US Men's 10 = UK 9), or subtract 2 from the US Women's shoe size (e.g., US Women's 8 = UK 6). Both systems use the Brannock device formula, but the UK shoe size formula uses a larger offset constant (23) compared to US Men's (22) and US Women's (21). US shoe sizes and UK shoe sizes follow the same incremental scale of one-third of an inch per size.
How do I convert US shoe size to EU?
Convert US shoe size to EU shoe size by first finding the foot length and then applying the EU formula: EU = (3/2) × foot length (cm) + 2. For US Men's, foot length (cm) = ((US size + 22) / 3) × 2.54. A US Men's 10 (foot length 27.9 cm or 11 inches or 279 mm) equals approximately EU 44. The EU shoe size is unisex, so the same EU number applies to both men and women.
Are US and UK shoe sizes the same?
No, US and UK shoe sizes are not the same. US Men's shoe sizes run 1 size larger than UK shoe sizes for the same foot length. US Women's shoe sizes run 2 sizes larger than UK shoe sizes. Both use the Brannock shoe size system with different offset constants: US Men's offset is 22, US Women's offset is 21, and UK/India offset is 23. A UK size 9 equals a US Men's 10 and a US Women's 11.
How do I convert shoe size to centimeters?
Convert shoe size to centimeters by reversing the shoe size formula for the relevant sizing system. For US Men's: foot length (cm) = ((US size + 22) / 3) × 2.54. For EU: foot length (cm) = (EU size − 2) / 1.5. For Japan/Mexico: foot length (cm) = Japan size (the Mondopoint system directly uses centimeters as the shoe size number). For China: foot length (cm) = (CN size + 10) / 2. Enter any shoe size into the shoe size calculator to see the foot length in centimeters (cm), millimeters (mm), and inches.
How do I convert foot length to shoe size?
Convert foot length to shoe size by entering the foot length measurement in centimeters (cm), millimeters (mm), or inches into the shoe size calculator. The calculator applies the shoe size conversion formula for each sizing system. For example, a foot length of 27 cm (270 mm, 10.6 inches) converts to: US Men's 10, US Women's 11.5, UK 9, EU 43, Japan/Mexico 27, and China 44.
Are men's and women's shoe sizes different?
Yes, men's and women's shoe sizes are different in the US/Canada and UK/India systems. US Women's shoe sizes run 1.5 sizes larger than US Men's shoe sizes for the same foot length. A US Women's 9.5 equals a US Men's 8. The Brannock device uses offset 21 for women and offset 22 for men. EU (European) shoe sizes, Japan shoe sizes, and China (CN) shoe sizes are unisex and identical for both men and women.
Are shoe sizes the same for every brand?
No, sizes vary between brands and manufacturers. Differences in last shape, construction method, and design mean a size 10 from one brand may fit differently than a size 10 from another. Standard conversion gives the baseline; always check the manufacturer's own size chart and try shoes on when possible.
How do I measure my foot for shoe size?
Measure your foot for shoe size by standing on a piece of paper with your heel against a wall, marking the tip of your longest toe, and measuring the distance from the wall to the toe mark. Measure in centimeters (cm), millimeters (mm), or inches. Measure both feet and use the measurement from the larger foot. Measure at the end of the day when feet are at their largest size. Enter the foot length into the shoe size calculator to find your shoe size in all 6 international sizing systems.
Should I measure both feet?
Yes, measure both feet. Most people have one foot that is 1–3 mm (0.04–0.12 inches) larger than the other foot. Use the measurement from the larger foot to determine your shoe size. Buying shoes based on the larger foot measurement ensures a proper shoe fit and prevents discomfort. A shoe that is slightly too large is more comfortable than a shoe that is too small.
How We Calculate
Our converter uses industry-standard formulas, not manually compiled lookup tables. Every result is computed from your input in real time, directly in your browser.
Formulas
All conversions start by determining foot length in centimeters, then applying the formula for each system:
- US/Canada Women ≈ 3 × foot length (inches) − 21 — rounded to nearest 0.5
- US/Canada Men ≈ 3 × foot length (inches) − 22 — rounded to nearest 0.5
- UK/India ≈ 3 × foot length (inches) − 23 — rounded to nearest 0.5
- EU (Paris Point) ≈ 1.5 × foot length (cm) + 2 — rounded to nearest whole number
- Japan/Mexico (Mondopoint) = foot length in cm — rounded to nearest 0.5
- China (CN) ≈ 2 × foot length (cm) − 10 — rounded to nearest whole number
- US/CA Child ≈ 3 × foot length (inches) − 9⅔ — Youth sizes subtract 13 when the child size exceeds 13.5
Rounding
US, UK, and Japan/Mexico sizes are rounded to the nearest half size. EU and China sizes use whole numbers only. Foot length is shown to one decimal place in centimeters and inches.
Limits
When a computed size falls outside a system's standard range, the converter displays “N/A” instead of an unreliable number. Accepted ranges are listed next to each input field.
Important
Results are estimates. These formulas represent industry baselines (Brannock, Paris Point, Mondopoint, GB/T 3294). Individual brands may deviate by half a size or more depending on last shape, materials, and intended fit. Always consult the brand's own size chart when available.
Popular Conversion Guides
Explore our detailed shoe size conversion guides for specific sizing systems, countries, and demographics.
EU to US Shoe Size
Convert European shoe sizes to US Men's and Women's with the Paris Point formula and full chart from EU 35 to 48.
US to EU Shoe Size
Convert US Men's and Women's shoe sizes to European EU sizes with worked examples and quick reference chart.
UK to US Shoe Size
Convert UK shoe sizes to US Men's and Women's. Simple rule: add 1 for Men's, add 2 for Women's.
US to UK Shoe Size
Convert US shoe sizes to UK with the Brannock formula. Covers both Men's and Women's conversions.
Men's to Women's Shoe Size
Convert between Men's and Women's shoe sizes. US Women's run 1.5 sizes larger than US Men's for the same foot.
Foot Length to Shoe Size
Convert your foot measurement in cm, mm, or inches to shoe sizes across all international sizing systems.
Kids' Shoe Size Chart
Complete kids' shoe size chart for ages 5-12 with US, UK, EU conversions and foot length in cm and inches.
India Shoe Size Chart
Convert India (UK) shoe sizes to US, EU, and Japan sizes. India uses the UK/Brannock sizing system.
Sources
- The Brannock Device Company — brannock.com — manufacturer of the Brannock Device, the standard foot-measuring instrument used in the US, Canada, UK, and India.
- ISO 9407 — Shoe sizes — Mondopoint system — iso.org/standard/81065.html — the international standard defining the Mondopoint sizing system used in Japan, Mexico, and for specialty footwear.
Only sources that were directly consulted and verified are listed here. The Paris Point system is well-documented in European footwear industry literature; the Chinese standard (GB/T 3294) is published by the Standardization Administration of China (SAC).