Shoe Size Converter

What’s European shoe size 41 in the USA? Or US women’s 7½ in the UK? If you’re grappling with questions like these, this handy shoe size converter is what you need.

Convert between:

• Mondopoint (mm)
• European
• UK (adults, children)
• US (men, women, children)

shoe sizes.

You want to convert shoe sizes between other systems? See below the converter for information about shoe sizes in Australia, Canada, India and other countries.

Select which system you’re converting from, then enter your shoe size. It’s that easy!

The converter lets you compare Mondopoint (mm), European, UK and US shoe sizes. But which countries use which system? And which have their own?

Apologies if I’ve not included your country/region. No offence intended. The world is a big place, full of different shoe size systems. I’m happy to update any important omissions.

As I was preparing this shoe size converter website in autumn (fall) 2025, I learned that the Indian shoe industry has prepared draft proposals for its own shoe sizing system – bha (bharat). Subject to approval, introduction was proposed for ‘by the end of 2025’. However, at the time of writing, this is still a draft proposal.

India currently uses the British, US and European systems (!), but Indians apparently often have wider feet than westerners, meaning it can be difficult to find shoes that fit well. And because Indians are generally not as tall, some of the larger UK, US and European sizes are not needed.

The industry decided it could manufacturer fewer sizes, but which are better suited to Indian feet.

After scanning the feet of 100,000 people in different parts of India, the draft proposes only eight sizes, which use uppercase Roman numerals.

1. Infants
2. Babies
3. Small children (preschool)
4. Children (of school age)
5. Girls
6. Boys
7. Women
8. Men

Fascinating stuff – all adult women would have the same shoe size, as would all adult men. For a more detailed explanation, including tables, see the Indian Footwear Sizing System website.

You prefer a shoe size conversion table over the converter above? No problem!

Ch indicates children’s sizes (UK and US systems).

To convert from inches, multiply your foot length in inches by 25.41, to find its length in millimetres. Round this up to the next multiple of 5. This is your Mondopoint size, which you can enter in the converter or find in the table.

Example:

Foot length: 10½ inches × 25.41 = 266.805 mm. Next Mondopoint size: 270. Enter this into the converter.

To convert to inches, use the converter to find your size in Mondopoint and divide this by 25.41 to get a rough idea of your foot size in inches.

The Mondopoint shoe sizing system was developed in the 1970s by the International Organization for Standardization.

It is used in the sports industry, for sizing:

• athletic shoes
• ski boots
• skates
• pointe ballet shoes

and is also used in countries including:

• Japan
• Taiwan
• South Korea
• Russia

as well as by some military organisations.

How does it work? It’s breathtakingly simple, being based on foot size in millimetres. Your foot is 250mm long? Your Mondopoint shoe size is 250. 252mm long? You need the next Mondopoint size up: 255.

Some shoes may also be labelled with a width: 250/100 means foot length 250mm and foot width 100mm.

No complicated calculations based on English measurement systems from hundreds of years ago!

If only the whole world used this system. But then shoe size converter websites would go out of business.

Yeah, I know what you mean. I grew up in the UK, where I’m a size 10, but live in Germany. UK size 10 is theoretically a European 44, but in practice I buy size 45 or sometimes even 46.

There are a few reasons why shoe size conversions aren’t always a reliable indicator that a shoe will actually fit you. In short:

Different measurement systems were developed in different countries. And then other countries adapted those systems for their own use.

Even how the different systems calculate shoe sizes is different. These are based on:

• the length of the foot
• the length of the shoe’s inner cavity
• the length of the last – the foot-shaped template over which a shoe is made.

Sometimes, the width of the foot or shoe is also considered.

And different manufacturers have their own preferences. Just because you wear a certain size of your favourite brand of trainers (sneakers) doesn’t mean to say you’d need the same size of a rival brand.

No wonder shoe size conversion is such a complicated business. You may be converting from a size based on the length of the shoe to one based on the size of its inner cavity. And the figures have to be compared and maybe rounded up…

1. Stand barefoot on a flat surface, making sure your body weight is equally distributed.
2. Measure from the end of your longest toe to the most prominent part of your heel.

To measure your foot width, follow the same instructions but measure the widest points of your foot.

Did you find this shoe size converter useful?

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