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International Shoe Size Converter
US, UK, EU & CM Instant Conversion

Our free shoe size converter instantly converts between US, UK, European (EU), and centimeter (CM) sizes for men, women, and kids. Perfect for online shopping across international retailers.

Last updated: May 11, 2026

👟 SizeSync

4 Systems US, UK, EU, CM

Shoe Size Converter

International Sizing System

US Size —

EU Size —

UK Size —

CM / JP —

Instant Conversion

Size Conversion Summary

Select a size to see your international conversions instantly.

Quick Reference Size Chart

US	UK	EU	CM	IN	FT

How to Measure Your Foot Properly

Accurate foot measurement is essential for finding the perfect shoe size. Follow these steps for precise results:

Step 1 Prepare Your Materials

Materials needed A piece of paper larger than your foot, a pencil or pen, a ruler or measuring tape, and a flat, hard floor surface.

Step 2 Measure at the Right Time

Best time Measure your feet at the end of the day when they are at their largest due to natural swelling from walking and standing.

Step 3 Trace Your Foot

Method Place the paper on a flat floor against a wall. Stand with your heel against the wall and your full weight on the foot. Trace the outline of your foot with the pencil held perpendicular to the paper.

Step 4 Measure the Length

Measurement Measure from the wall (heel) to the longest point of your toes in centimeters. This is your foot length. Measure both feet and use the larger measurement.

Understanding International Size Systems

Different regions use different sizing standards, which can be confusing when shopping internationally. Here's how each system works:

US & Canada Sizing

US sizes are based on the Brannock device measurement, which measures both foot length and width. US sizes are typically 1 size larger than UK sizes for the same foot length. For example, a US 9 is equivalent to a UK 8 in men's sizing.

UK Sizing

UK sizing is based on the length of the last (the mold used to make the shoe), measured in barleycorns (1/3 inch). UK sizes are generally smaller than US sizes. A UK size is calculated as: (foot length in inches - 1) × 3, rounded to the nearest whole or half size.

European (EU) Sizing

EU sizes are based on Paris Points, where 1 Paris Point equals 2/3 of a centimeter. EU sizing uses the formula: EU = (foot length in cm × 1.5) + 2. This system is used throughout most of Europe and provides a more direct correlation to foot length in centimeters.

Centimeter (CM) / Japan Sizing

CM sizing is the most straightforward system — it directly corresponds to your foot length in centimeters. This system is used in Japan, Korea, and increasingly as a universal standard. Simply measure your foot in CM and that's your size. For example, a 26cm foot equals size 26.

Men's vs Women's Sizing

Men's and women's sizes are not the same, even within the same country's system. Generally:

US Women's to Men's: Subtract 1.5 to 2 sizes. For example, women's US 8 ≈ men's US 6.5-7.
UK Women's to Men's: Subtract approximately 1 to 1.5 sizes.
EU Women's to Men's: Subtract approximately 1 to 2 sizes, though this varies by brand.
CM sizing: Usually the same for both genders, as it's based on actual foot length.

Important Considerations

Width Matters Too

Shoe sizes only account for length, but foot width is equally important for comfort. Common width designations include:

Narrow (N/2A): For slender feet
Medium/Regular (M/D/B): Standard width for most people
Wide (W/2E/EE): For wider feet
Extra Wide (XW/4E/EEEE): For very wide feet

Brand Variations

Sizing can vary significantly between brands. A size 9 in Nike may fit differently than a size 9 in Adidas. Always check the specific brand's size chart when possible, and read customer reviews for sizing feedback.

Half Sizes

Half sizes provide approximately 1/6 inch (4.23mm) difference in length. If you're between sizes, it's generally better to size up for comfort, especially for athletic shoes or if you plan to wear thick socks.

Kids' Shoe Sizing

Children's shoe sizing follows a different scale than adult sizing. Kids' sizes typically run from toddler sizes (around US 5-10) to "big kid" sizes (US 1-7), after which they transition to adult sizing. Kids' sizes are usually the same for boys and girls until they reach adult sizes.

International Shopping Tips

Always measure in CM: Centimeters are universal and eliminate conversion confusion.
Check return policies: International returns can be expensive, so verify the retailer's return policy before purchasing.
Read size reviews: Customer reviews often mention if a brand runs large, small, or true to size.
Consider sock thickness: Account for the type of socks you'll wear with the shoes when selecting size.
Toe box space: Ensure about 1/2 inch (1.27cm) of space between your longest toe and the front of the shoe for comfort.

Related Tools

Unit Converter — Convert between different measurement systems including length units.
Percentage Calculator — Calculate discounts and savings during shoe sales.

Frequently Asked Questions

What is my shoe size in CM if I'm a US 9 men's?

A US men's size 9 typically corresponds to approximately 27 cm in foot length. Use our converter above for precise conversions based on your specific size and category.

How do I convert US women's size to EU?

To convert US women's to EU, add approximately 31-33 to the US size. For example, US women's 8 ≈ EU 38-39. However, this varies by brand, so always check the specific manufacturer's size chart. Our converter provides standard conversions.

Are UK and US shoe sizes the same?

No, UK and US sizes are different. For men, US sizes are typically 1 size larger than UK sizes (US 9 = UK 8). For women, the difference is approximately 2-3 sizes (US women's 8 = UK 5-6). Always verify with a conversion chart.

What is the difference between men's and women's shoe sizes?

Men's and women's shoe sizes are on different scales. In the US system, women's sizes are typically 1.5-2 sizes larger than men's for the same foot length. For example, a foot that fits a men's US 8 would typically fit a women's US 9.5-10. The difference varies by country and brand.

How do I know if I need wide or extra-wide shoes?

Signs you may need wide shoes include: feet spilling over the sides of standard shoes, pinching or pressure on the sides, blisters on the sides of your feet, or discomfort after short periods. Measure your foot width at the widest point — if it's significantly wider than standard for your length, consider wide widths.

Should I size up or down if I'm between sizes?

Generally, size up rather than down. A slightly larger shoe can be adjusted with thicker socks or insoles, but a shoe that's too small cannot be made comfortable. This is especially important for athletic shoes, dress shoes you'll wear all day, or if you have wider feet. Allow about 1/2 inch of space in the toe box.

Why do shoe sizes vary between brands?

Shoe manufacturers use different lasts (molds) to create their shoes, and these lasts vary in shape and sizing. Some brands intentionally run larger or smaller. Athletic brands may have different sizing than dress shoe brands. Always check specific brand size charts and read customer reviews for sizing feedback.

How often should I remeasure my feet?

Remeasure your feet annually or whenever you notice shoes feeling tighter. Feet can change size over time due to age, weight changes, pregnancy, medical conditions, or prolonged standing. Adults' feet can increase by half a size or more over their lifetime.

What is the most accurate shoe sizing system?

Centimeter (CM) or Mondopoint sizing is considered the most accurate because it directly corresponds to actual foot length. This system eliminates the confusion of different scales between countries and is becoming more common internationally. Many European brands now list both their traditional size and the CM equivalent.

How do kids' shoe sizes convert to adult sizes?

Kids' sizes typically run from toddler (US 5-10) through "big kid" sizes (US 1-7). After US 7 in kids' sizing, they transition to adult sizing. Generally, kids' US size 7 equals men's US size 7. Girls may transition to women's sizing earlier, around kids' size 5-6.

⚠️ Disclaimer: Size conversions are approximate and may vary by brand and style. Always check the manufacturer's specific size chart. See our full Disclaimer.

International Shoe Size Converter US, UK, EU & CM Instant Conversion