Why do brands disagree about my size?

Because a size is a label on a shoe last (the foot-shaped mould), not a direct readout of your foot. Two brands can build a 42 on lasts that differ in length and width, and running shoes carry more toe allowance than dress shoes. A Nike, an Adidas, and a Clarks 42 can all fit slightly differently on the same foot. This tool gives the industry-mainstream mapping; treat it as a starting point and always check the specific brand's size guide before you buy.

How do I measure my foot length correctly?

Put a sheet of paper against a wall, stand with your heel touching the wall, and mark the paper at the tip of your longest toe (it is not always the big toe). Measure heel-to-mark in millimetres. Do it in the evening, when feet are at their largest, measure both feet, and use the larger number. Feed that mm value into the Foot length field and read off every scale.

How much do US men's and women's sizes differ?

By convention, a US women's size is about 1.5 sizes larger in number than the US men's size for the same foot, and a US men's size is one full number above the UK size while a US women's size is 2.5 above the UK size. So a 250 mm foot is roughly a US men's 8 / UK 7.5, but a US women's 9.5 / UK 7. Picking the wrong gender column is the single most common conversion mistake — set the wearer toggle first.

What is the China (CN) number based on?

China's GB/T 3293 standard uses the foot length in millimetres as the shoe number, so a 260 mm foot is a 260 (often printed as 26 hao). That makes the CN column identical to the measured foot length here. Some Chinese retailers also print the EU number on the box, so check which one the listing means.

Is half-size accuracy good enough to buy blind?

For sneakers and casual shoes a single chart gets you within half a size most of the time, which is usually fine. For leather dress shoes, narrow lasts, or expensive purchases, order from a brand whose own size guide quotes a foot-length range, and prefer free returns. The closest-match badge in the results tells you when your input fell between two standard sizes.

Buy US-listed sneakers from China without guessing

A US drop lists a sneaker in men's US sizes only and you shop from China. Measure your foot at 268 mm, switch the wearer to men's, set the input scale to Foot length, type 268. The result snaps to the 269 mm row: US 10, UK 9.5, EU 44, JP 28. You order the US 10 with confidence instead of converting in your head and landing a half size off.

Daigou ordering on behalf of a client who only knows EU

A daigou client says "I'm a EU 39 in women's". Set wearer to women's, input scale to EU, type 39. You read back US 7, UK 4.5, foot length 23.3 cm. Now you can buy from a US or Japanese store that doesn't list EU and copy the whole row into your order notes with one tap.

Gift shoes to a relative overseas

Your cousin in Japan wears a JP 25 and you want to send a UK-made pair. Pick women's, JP, type 25. The chart gives UK 6, EU 40.5, and a 25.0 cm foot length, so you order the UK 6 and include the cm length in the card in case they want to exchange it.

Decode a foreign size sticker while travelling

You find shoes abroad labelled only "41" with no country marked. Type 41 into the EU field for men's: foot length 26.5 cm, US 8.5, UK 8. Stand the shoe against your own foot length to sanity-check before the language barrier turns a bargain into a return you can't make.

Build a size reference for a small cross-border shop

You sell shoes to mixed US/EU/Asia customers and keep getting "what's my size?" messages. Use the full chart at the bottom of the tool as your reference, and share a pre-filled link (it encodes wearer + scale + value) in your FAQ so buyers self-serve instead of DMing you.

Shoe Size Converter — US / UK / EU / CN / JP + Foot Length

US ⇄ UK ⇄ EU ⇄ CN ⇄ JP + foot length (cm/in) — men, women, kids — browser-only

Runs locally
Category Calculator
Best for Getting a realistic range before a purchase, plan, workout, or schedule decision.

Wearer

I know the size inSize value

Equivalent sizes

exact

Foot length26.0 cm / 10.24 in

Sizes are the industry mainstream mapping. Brands vary by up to one full size — always check the brand size guide before buying.

How to measure

Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe, measure heel-to-toe in mm. Measure both feet in the evening (feet swell during the day) and use the larger one.

Men's full chart

Foot length (mm)	US	UK	EU	JP
218	4	3.5	36	22
223	4.5	4	36.5	22.5
227	5	4.5	37.5	23
231	5.5	5	38	23.5
235	6	5.5	38.5	24
240	6.5	6	39	24.5
244	7	6.5	40	25
248	7.5	7	40.5	25.5
252	8	7.5	41	26
256	8.5	8	42	26.5
260	9	8.5	42.5	27
265	9.5	9	43	27.5
269	10	9.5	44	28
273	10.5	10	44.5	28.5
277	11	10.5	45	29
281	11.5	11	45.5	29.5
285	12	11.5	46	30
294	13	12.5	47.5	31
302	14	13.5	48.5	32
311	15	14.5	49.5	33

What this tool does

A shoe size converter that actually anchors to physics. Pick the wearer (men's, women's, or kids') and type a size you already know in any of six scales — US, UK, EU, China (mm shoe number), Japan (cm), or raw foot length in millimetres — and it instantly shows every other scale plus your foot length in both centimetres and inches. Tap any value to copy it, or copy the whole row at once. Every row is keyed to a measured foot length, the only objective number behind any sizing chart, so a US men's 9 always lands on the same physical row as UK 8.5, EU 42.5, and a 260 mm foot — no drifting formulas, no compounding rounding errors. Off-grid inputs (you measured 253 mm, or you typed EU 41 between two half sizes) snap to the closest standard size and the result is flagged as a closest match rather than an exact one, so you know when to size up. The conversion table and all the maths run as plain JavaScript in your browser — nothing is uploaded, and the shareable link encodes only the wearer, the input scale, and the size value so a friend opening it lands on the same conversion. Built for haitao shoppers, daigou buyers, travellers facing a foreign size sticker, and anyone buying shoes as a gift across borders.

Tool details

Input: Numbers; The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
Output: Live result + Copy + Preview; The result area focuses on usable output, with copy, download, or preview actions when supported.
Privacy: Browser-side processing; The main tool logic does not call an external API, so inputs normally stay in the current tab.
Save / share: Shareable URL state; Key settings are encoded in the URL so another person can reopen the same setup.
Performance budget: Initial JS <= 12 KB; No WASM budget is declared, keeping the tool quick to open on mobile.
Best fit: Calculator · Content Creator; Category and role tags drive related tools, internal links, and quick fit checks.

How to use

1. Input

Paste or drop your content into the tool panel.
2. Process

Click the button. All processing is local in your browser.
3. Copy / Download

Copy the result or download to disk in one click.

How Shoe Size Converter fits into your work

Use it for fast estimates, comparisons, and planning numbers before you make the final call.

Calculation jobs

Getting a realistic range before a purchase, plan, workout, or schedule decision.
Comparing scenarios by changing one input at a time.
Turning rough assumptions into a number you can discuss.

Calculation checks

Double-check units, dates, rates, and rounding assumptions.
Treat health, finance, tax, and legal outputs as planning aids, not professional advice.
Save the inputs that produced an important result so you can reproduce it later.

Good next steps

These links move the current task into a more complete workflow.

Real-world use cases

Buy US-listed sneakers from China without guessing
A US drop lists a sneaker in men's US sizes only and you shop from China. Measure your foot at 268 mm, switch the wearer to men's, set the input scale to Foot length, type 268. The result snaps to the 269 mm row: US 10, UK 9.5, EU 44, JP 28. You order the US 10 with confidence instead of converting in your head and landing a half size off.
Daigou ordering on behalf of a client who only knows EU
A daigou client says "I'm a EU 39 in women's". Set wearer to women's, input scale to EU, type 39. You read back US 7, UK 4.5, foot length 23.3 cm. Now you can buy from a US or Japanese store that doesn't list EU and copy the whole row into your order notes with one tap.
Gift shoes to a relative overseas
Your cousin in Japan wears a JP 25 and you want to send a UK-made pair. Pick women's, JP, type 25. The chart gives UK 6, EU 40.5, and a 25.0 cm foot length, so you order the UK 6 and include the cm length in the card in case they want to exchange it.
Decode a foreign size sticker while travelling
You find shoes abroad labelled only "41" with no country marked. Type 41 into the EU field for men's: foot length 26.5 cm, US 8.5, UK 8. Stand the shoe against your own foot length to sanity-check before the language barrier turns a bargain into a return you can't make.
Build a size reference for a small cross-border shop
You sell shoes to mixed US/EU/Asia customers and keep getting "what's my size?" messages. Use the full chart at the bottom of the tool as your reference, and share a pre-filled link (it encodes wearer + scale + value) in your FAQ so buyers self-serve instead of DMing you.

Common pitfalls

Converting with the wrong wearer column. A US women's 8 and a US men's 8 are different feet — the men's size is roughly 1.5 numbers larger for the same foot. Always set the men's / women's / kids toggle before reading any result.
Treating EU and CN as the same because both can appear on a Chinese shoe box. EU 42 and a CN 42 (interpreted as a 42 hao) are not the same length. Here CN is the foot length in mm (260, not 42), so read the column label, not just the number.
Trusting a single chart for an expensive narrow-last dress shoe. Half-size charts are tuned for mainstream sneaker lasts. For leather shoes or wide/narrow fits, use the brand's own foot-length range and prefer free returns — the closest-match badge tells you when you were between sizes.

Privacy

The whole conversion table and every calculation are plain JavaScript running in your browser tab. Your foot length and sizes are never uploaded, and there is no logging of what you converted. The one privacy note: the shareable URL encodes the wearer, the input scale, and the size value (for example ?g=women&s=eu&v=39) so a friend who opens the link sees the same conversion — which means the destination server's access log records that size. For casual sizing that is harmless; if you would rather not share a personal foot measurement, use the copy buttons instead of sharing the link.

FAQ

Tool combos

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Shoe Size Converter — US / UK / EU / CN / JP + Foot Length

Equivalent sizes

How to measure

Men's full chart

What this tool does

Tool details

How to use

1. Input

2. Process

3. Copy / Download

How Shoe Size Converter fits into your work

Calculation jobs

Calculation checks

Good next steps

Real-world use cases

Buy US-listed sneakers from China without guessing

Daigou ordering on behalf of a client who only knows EU

Gift shoes to a relative overseas

Decode a foreign size sticker while travelling

Build a size reference for a small cross-border shop

Common pitfalls

Privacy

FAQ

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