I made this international size converter after one too many “is UK 10 the same as US 6” moments. Pick your item type, choose the region you know, tap Convert. You get instant matches across US, UK, EU, AU, and JP, plus a quick fit note if you land between sizes. It sits next to our clothing size calculator so you can map sizes fast without guessing.
Use the tool on this page, then keep reading for real world tips, an international clothing size chart, and the little checks that save returns.
International Size Converter
Pick an item type, tell us the size and where it comes from. We will convert it to US, UK, EU, AU, JP.
Developer self tests
Related reads: How to tell if your bra fits, Balconette vs plunge, which to wear, How much does a capsule wardrobe cost?
How to use it, the quick version
- Choose item type, tops, dresses, bottoms.
- Select your region, US, UK, EU, AU, or JP, then enter the size you usually buy.
- Tap Convert, copy the result, or bookmark the page so it opens with your size next time.
- Read the fit note, woven fabric, consider the larger size. Knit with stretch, the smaller one might work.
Pro move: Toggle between centimeters and inches anywhere you see measurements. The tool speaks both.
How I use it in real life
Last month I ordered a structured blazer from a UK brand. My usual US 6 converted to UK 10. That answered the classic, is UK 10 the same as US 6 question for that label. The tool flagged a between sizes note, I checked the fabric, zero stretch, and stayed with UK 10. Shoulders were perfect, sleeves landed at the wrist, no return.
Two weeks later I grabbed a relaxed cardigan from a JP label. My US Medium mapped cleanly. The fit note reminded me JP knits can run narrower through the shoulder. I kept the suggested size and it sat neat without pulling.
Women’s international size conversion, quick map
These are baselines. Brands add their own ease, the tool reflects that with notes. This section covers common jumps like US to EU size and UK to US size.
- US 0, 2, 4, 6, 8, 10, 12
≈ UK 4, 6, 8, 10, 12, 14, 16
≈ EU 32, 34, 36, 38, 40, 42, 44
≈ AU 4, 6, 8, 10, 12, 14, 16
≈ JP 5, 7, 9, 11, 13, 15, 17 - Alpha sizes
XS, S, M, L, XL often align to US 0 to 2, 4 to 6, 8 to 10, 12 to 14, 16 to 18.
Quick examples
- US 6 → UK 10, EU 38, AU 10, JP 11
- US 10 → UK 14, EU 42, AU 14, JP 15
Men’s international size conversion, quick map
Fast check, US Large often maps to EU 52 to 54. Use chest in inches or centimeters for the cleanest result.
- Tops and jackets: US Small, Medium, Large often map to EU 46, 48 to 50, 52 to 54.
- Trousers and jeans: Waist in inches is cleanest. The tool returns the EU number and a note on inseam when it matters, helpful for EU to US size mapping.
International clothing size chart
Common conversions at a glance. Use these to sanity check, then let the tool refine for your item type.
| US | UK | EU | AU | JP |
|---|---|---|---|---|
| 4 | 8 | 36 | 8 | 9 |
| 6 | 10 | 38 | 10 | 11 |
| 8 | 12 | 40 | 12 | 13 |
| 10 | 14 | 42 | 14 | 15 |
These are baselines. Use the tool above for the closest match by item type.
More quick examples for searchers
What is EU 38 in US: Usually US 6.
US size 8 in EU: Often EU 40.
UK size 12 to US: Typically US 8.
Five tips that actually help
- Check fabric first, 2 to 3 percent elastane often gives you a half size of ease, rigid denim does not.
- Mind the rise and the hip, for jeans, a higher rise can free up hip room, a low rise can feel tighter through the seat.
- Watch region tendencies, UK and AU are usually aligned for womenswear, JP labels can run narrower through shoulder and hip.
- Measure once, keep bust, waist, hip in both inches and centimeters in your phone notes.
- Between sizes, choose the larger size for wovens, consider the smaller size for knits.
My shopping flow with a new brand
- Run my usual size through the international size converter.
- Scan the product page for fabric, stretch, and garment length.
- Read any brand fit note, relaxed fit, runs small, or true to size.
- Choose the suggested size, or size up if the fabric is rigid and my result sits between sizes.
- Copy the result, paste it into Notes, and save the link with the query string for next time.
Related tools and guides
- Bra Size and Sister Size Finder, when the question is band and cup, not region.
- Jeans Fit Calculator, when you need clarity on waist, rise, and inseam.
- Belt Size Calculator, once jeans size is set and you want the right hole range.
- Learn how to read size charts before you buy. A two minute scan can save a return.
FAQ
What is EU 38 in US?
Usually US 6. Use the calculator for your item type to confirm the closest match.
Is UK 10 the same as US 6?
Often yes for womenswear. Fabric and brand ease can change the feel. Woven fabrics are less forgiving than knits.
US size 8 in EU, what is it?
Often EU 40. Check the fit note if your result sits between sizes.
Do AU and US sizes match?
AU and UK numbers often align for womenswear. AU 10 is usually close to UK 10. Compare fabric content and the shop chart.
How accurate are international size charts?
They are solid baselines. Braand blocks and ease vary. The tool flags this when you land between sizes.
What should I do if I am between sizes?
Go larger for woven fabrics. Consider smaller for knits with stretch. The results panel includes this reminder when it applies.
Can I use this for kids?
This page focuses on adults. If you want a kids version, tell me and I will add it.
What about shoes?
Use the shoe size converter. Shoes include widths and Mondopoint, they get their own tool.
Ready to convert your size
Open the tool above, pick your region, and copy your results. If you want a second opinion by fit, jump into the Jeans Fit Calculator or Bra Size Finder next.
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Iskra Banović is our seasoned Editor-in-Chief at Blufashion. She has been steering the website’s content and editorial direction since 2018. With a rich background in fashion design, Iskra’s expertise spans across fashion, interior design, beauty, lifestyle, travel, and culture.
