Shoe Size Converter — Japan (cm), US, UK, EU

Instantly convert shoe sizes between Japan (cm), US, UK, and EU systems. Get quick answers like "what is US size 8 in EU?" plus separate men's and women's charts — ideal for shopping from overseas retailers.

Gender

Convert from

Size

Japan (cm)
US
UK
EU

Men's Size Chart

Japan (cm)	US	UK	EU
24	6	5	38.5
24.5	6.5	5.5	39
25	7	6	40
25.5	7.5	6.5	40.5
26	8	7	41
26.5	8.5	7.5	42
27	9	8	42.5
27.5	9.5	8.5	43
28	10	9	44
28.5	10.5	9.5	44.5
29	11	10	45
29.5	11.5	10.5	45.5
30	12	11	46

Women's Size Chart

Japan (cm)	US	UK	EU
21	4	2	34
21.5	4.5	2.5	34.5
22	5	3	35
22.5	5.5	3.5	35.5
23	6	4	36
23.5	6.5	4.5	37
24	7	5	37.5
24.5	7.5	5.5	38
25	8	6	39
25.5	8.5	6.5	39.5
26	9	7	40

The chart above is a general guideline. Actual fit can vary by manufacturer, brand, and shoe shape (width, instep height, etc.). Trying the shoe on in person is recommended whenever possible.

What Is Shoe Size Conversion? Understanding Japan, US, UK, and EU Sizes

Shoe sizing around the world falls into three broad systems. Japan expresses the actual measured length of the foot directly in centimeters. The US and UK use their own numbering systems that trace back to medieval Europe. The EU, meanwhile, uses a point system based on the length of the shoe's internal last. Because these three systems aren't related by a simple multiplier, there's no mental shortcut like "multiply the centimeter value by X to get the EU size."

This tool converts between all four notations — Japan (cm), US, UK, and EU — using separate reference charts for men's and women's sizes. Keep in mind that there's no single international standard for shoe sizing, and last design varies by manufacturer and brand, so the converted result is a general guideline rather than a guarantee of fit. Actual comfort can still differ from the number shown.

How to Convert Shoe Sizes

Select a gender Men's and women's sizes correspond to different US/UK numbers even at the same measured foot length, so choose the gender that matches the shoe you're buying first.
Choose the unit you're converting from Pick whichever notation you already know — Japan (cm), US, UK, or EU. Just match whatever unit is shown on the overseas retailer's product page.
Pick the size value Choose the specific number from the dropdown — either a size you already own or one you want to check.
Read the converted result All four equivalent notations — Japan (cm), US, UK, and EU — appear at once for the size you selected.
Check neighboring sizes on the chart If your size falls near a boundary between two values, compare the size above and below it in the men's or women's chart further down the page.

Tips for getting more out of it

When buying shoes from an overseas retailer, if an actual measured-length figure in centimeters is listed alongside the US/UK size, check that instead — it's usually more reliable than the size label alone.
Men's and women's sizes differ even at the same measured length in centimeters (for example, 24.0 cm is men's US 6, but women's US 7). Make sure you've selected the right gender.
EU sizes are often set in fine 0.5 increments, so where a given JP (cm) size maps to more than one possible EU value, the closer match is used.
Some brands note that they "run a size large" or "run small," so treat this chart as a starting point and cross-check with fit reviews where available.

When This Comes In Handy

Ordering shoes from an overseas retailer

Sites like Amazon or eBay often list only US or UK sizes. Entering your usual Japan size (cm) first lets you check the corresponding US/UK number before ordering, cutting down on returns and exchanges.

Buying shoes at a store while traveling abroad

If you're shopping at a store in Europe and only EU sizes are posted, converting your familiar Japan size to EU beforehand lets you tell the staff exactly what you need.

Checking a brand's official size guide

Official size guides from brands like Nike or Adidas are often written in US sizing. Converting your Japan size to US ahead of time lets you match it directly against the guide.

Verifying sizes on resale marketplaces or through a buying agent

When a seller on an overseas resale platform lists a size in a notation you're not used to, converting it here first helps you avoid an ill-fitting purchase and a costly return.

Glossary

US size: The shoe sizing notation used in the United States. It's based on a sequential last number, and the number differs between men's and women's shoes even at the same measured length.
UK size: The shoe sizing notation used in the United Kingdom, also based on a sequential last number like the US system. UK numbers tend to run lower than the equivalent US numbers.
EU size: The shoe sizing notation widely used across continental Europe. It expresses the length of the shoe's internal last in units of 2/3 cm, and is sometimes called the French point system.
Japan size (cm): The actual measured length of the foot, from the heel to the tip of the longest toe, expressed in centimeters. Unlike US, UK, or EU sizes, it's based directly on a physical measurement rather than a last number.
Last: The foot-shaped mold used to construct a shoe. Its shape and dimensions vary by manufacturer and brand, which is the main reason two shoes with the same labeled size can feel different.
Width: The measurement around the widest part of the foot, from the base of the big toe to the base of the little toe. Even with the same length size, a wider foot can make a shoe feel tight.

Frequently Asked Questions

There's no single international standard for shoe size labels (US, UK, EU, etc.) — each country and manufacturer sets sizes based on its own shoe last. This chart uses the guideline values commonly found across multiple manufacturers and retailers, but actual fit still varies by brand.

Japanese shoe sizing expresses the actual measured length of the foot — from the heel to the tip of the longest toe — in centimeters. Unlike US, UK, or EU sizes, which are sequential last numbers, it's based directly on a physical measurement.

Even at the same measured length in centimeters, men's and women's shoes are built on different lasts, so the corresponding US/UK size numbers differ. For example, 24.0 cm corresponds to men's US 6 but women's US 7.

This tool covers adult men's and women's sizes only. Children's shoes typically use a separate sizing system tied to growth stages (kids' sizes), which isn't covered by this chart.

Side Note — why shoe sizing is such a mess across countries

Shoe sizing diverges sharply between places that use the metric system (cm) — Japan and parts of Europe — and the US/UK, which use their own numbering systems. US and UK sizes in particular are still built on an old system based on the "barleycorn," a medieval English unit of length equal to about three grains of barley (roughly 8.47 mm), a system that developed entirely independently of the modern International System of Units.

EU sizing (sometimes called the French point system) counts the length of the shoe's internal last in units of 2/3 cm, and is said to have been devised by French shoemakers in the 19th century. The key difference from Japan's cm-based labeling is that it's based on the length of the shoe last itself, not a direct measurement of the foot.

The International Organization for Standardization (ISO) established a universal sizing system called Mondopoint (based on actual foot length in millimeters) back in the 1970s, but the sizing conventions consumers are already used to — US, UK, EU, and the like — have proven stubborn, and Mondopoint has never really caught on in stores or online retailers.

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