Shoe Size Conversion Chart: US, UK, and EU Sizing Explained

Why Shoe Sizes Are So Confusing

Unlike most measurements, shoe sizes are not based on a single international standard. The United States, United Kingdom, and continental Europe each developed their own sizing systems independently, and none of them maps directly to a simple foot measurement in centimeters or inches. To make matters worse, sizing can vary between manufacturers within the same country, meaning a size 10 from one brand may fit differently than a size 10 from another.

This inconsistency creates real problems for online shoppers, international travelers, and anyone trying to buy shoes from foreign brands. Understanding how each system works and how to measure your own feet properly is the best way to find shoes that actually fit.

US Shoe Sizing

The US sizing system uses a barleycorn scale, where each full size represents one-third of an inch (approximately 8.47 mm). US men's and women's sizes are offset: a women's size is typically 1.5 sizes higher than the equivalent men's size for the same foot length. So a men's 9 and a women's 10.5 fit approximately the same foot. Children's sizes use yet another scale that resets at size 13 before transitioning to adult sizes.

US sizes typically range from 6-13 for men and 5-12 for women, with half sizes available. Width is indicated by letters: B is standard for women, D is standard for men, and wider options go up to EE or EEE. Width designations are important but often overlooked; many people wearing the wrong size are actually wearing the wrong width.

UK Shoe Sizing

The UK system also uses the barleycorn unit and is closely related to the US system, but with different starting points. UK sizes run approximately one size lower than US men's sizes and two sizes lower than US women's sizes. A US men's 10 is roughly a UK 9, and a US women's 8 is roughly a UK 6.

UK sizing is used throughout Britain, Ireland, Australia, New Zealand, and several other Commonwealth countries, though some of these nations have adopted slight variations over time. Like US sizes, UK sizes come in half-size increments and use letter-based width designations, though the specific letters may differ between manufacturers.

EU Shoe Sizing

The European system, also called the Paris Point system, uses a different base unit. One Paris Point equals two-thirds of a centimeter (approximately 6.67 mm). EU sizes are unisex, meaning the same number applies to both men's and women's shoes, which simplifies things considerably. Sizes typically range from 35 to 48, with some brands offering half sizes and others not.

To approximate your EU size, measure your foot length in centimeters, add 1.5 cm for toe room, then multiply by 1.5. A 27 cm foot would calculate as (27 + 1.5) x 1.5 = 42.75, suggesting an EU 42 or 43. This formula provides a starting point, but trying shoes on remains essential since last shapes and padding thickness vary between brands.

How to Measure Your Feet Properly

Accurate foot measurement is the foundation of finding well-fitting shoes in any sizing system. Follow these steps for the best results:

• Measure in the afternoon or evening, when feet are at their largest after a day of walking
• Stand on a piece of paper with your full weight on the foot, wearing the type of socks you plan to wear with the shoes
• Mark the longest point of your toe and the back of your heel, then measure the distance between the marks
• Measure both feet, as most people have one foot slightly larger than the other; always size for the larger foot
• Measure width at the widest part of your foot (across the ball) for width sizing

Keep in mind that foot size can change over your lifetime. Weight gain, pregnancy, aging, and certain medical conditions can all affect foot dimensions. If your shoes have been feeling uncomfortable recently, it may be worth remeasuring rather than assuming your old size still applies.

Tips for Buying Shoes Internationally

When ordering shoes from international retailers, never assume a size conversion is exact. Check the brand's specific size chart if available, as these are based on their actual shoe lasts rather than generic conversion tables. Read reviews for insights on whether a particular model runs large or small. If possible, order from retailers with free return shipping so you can exchange for a different size without additional cost.

Japanese and Korean shoe sizes use centimeters directly, which is arguably the most logical system. A size 27 means the shoe fits a 27 cm foot. If more brands adopted this approach, much of the international sizing confusion would disappear. Until then, a shoe size converter and accurate foot measurements are your best defense against ordering the wrong size from an international retailer.