👟Shoe Size Converter

Finding the right fit across international sizing systems is one of the most common frustrations when shopping for footwear online. Our shoe size converter and shoe size chart conversion tool takes the guesswork out of matching US, UK, EU, and centimeter measurements so you can order with confidence from any retailer worldwide.

US to UK and EU Shoe Size Converter: How the Systems Differ

Shoe sizing systems evolved independently across countries, which is why a straightforward conversion table rarely tells the whole story. The US system is built on the Brannock Device, a foot-measuring tool introduced in 1927 that measures in barleycorn units (one-third of an inch). The UK system follows a similar barleycorn scale but starts one unit lower, so a US men's size 10 equals a UK size 9.

The European system, sometimes called the Paris point system, measures the interior length of the shoe last in units of two-thirds of a centimeter. Because it is based on a continuous physical measurement rather than an arbitrary scale, EU sizes are gender-neutral by design. A person with a 26 cm foot wears an EU 42 regardless of gender. Japan and several other countries use foot length in centimeters directly, making their system the most intuitive for anyone who has measured their foot with a ruler.

No single conversion formula works perfectly across all brands because each manufacturer uses its own last shape and may round sizes differently. Use this tool as your starting reference, then cross-check against the specific brand's own size chart before purchasing.

Women's to Men's Shoe Size Conversion

In the US, women's shoe sizes run approximately 1.5 sizes larger than men's sizes for the same foot length. A woman who wears a US women's size 9 would typically wear a US men's size 7.5. This offset matters most when shopping for unisex sneakers, athletic footwear marketed primarily in men's sizing, or kids' shoes that bridge the gap between youth and adult sizes.

If you are shopping for athletic shoes that only come in men's sizes, subtract 1.5 from your women's US size to find your starting point. Because EU sizes are gender-neutral, EU sizes sidestep this conversion entirely. A women's US 8 and a men's US 6.5 both correspond to roughly an EU 39, so switching to EU sizing when comparing international options often simplifies the process.

Kids' sizes follow yet another scale. Big kids' sizes in the US typically run from size 3.5 to 7 before transitioning into adult sizing. A big kid's size 6 is close to a women's US 7.5 or a men's US 6, which is a useful reference when older children need to shop in the adult section.

International Shoe Size Converter Chart: Measuring Your Foot Correctly

No conversion chart can help you if you start from the wrong foot length measurement. The most accurate method is to measure in the afternoon or early evening, when feet are at their largest after a full day of activity. Feet can swell by up to half a centimeter compared to morning measurements, and buying based on your morning measurement is a common cause of shoes that feel tight by the end of the day.

To measure at home, place a piece of paper on a hard floor, stand on it with your full weight, and trace around your foot holding a pencil vertically. Measure the straight-line distance from the back of your heel to the tip of your longest toe. Repeat for both feet and use the larger measurement, since most people have one foot slightly bigger than the other.

Once you have your foot length in centimeters, add 10 to 12 mm for proper fit. That extra space allows your toes to lie flat and your foot to move naturally during walking. The resulting number is the interior shoe length you are looking for, which corresponds to the measurement used in most international shoe size charts.

Width, Half Sizes, and Why Brands Vary

Shoe length is only part of the fit equation. Width plays a critical role in comfort, yet many international retailers offer only a single standard width. US sizing uses letter codes for width: for men, D is standard, E and EE are wide and extra-wide, and B is narrow. For women, B is standard, D is wide, and AA is narrow. European brands sometimes use width letters such as F, G, and H, while others state width in millimeters.

Half sizes in the US and UK provide finer fitting increments of approximately 4 to 5 mm. European sizing moves in whole numbers, where each EU size step equals about 6.67 mm of last length. If you fall between two EU sizes, sizing up and wearing a slightly thicker sock often produces a better fit than sizing down into a shoe that is too short.

• Half sizes: US and UK offer half sizes; EU does not use them in the same way.
• Brand variation: The same nominal size from two different brands can differ by up to a full size in actual interior length.
• Last shape: A narrow last produces a snug fit even in the correct size, particularly across the ball of the foot.
• Vanity sizing: Some fashion brands size generously to flatter shoppers, so always read customer reviews mentioning fit before ordering internationally.