How do I convert US to UK clothing size?

Use the size chart above — find your {fn} size in the left column and read the {tn} equivalent on the right. Remember that sizes are approximate and vary by brand.

Is US size the same as UK size?

No — {fn} and {tn} use different sizing systems with no direct numeric equivalence. The chart above shows typical correspondences, but always check brand-specific size guides before purchasing.

Why don't clothing sizes match between countries?

Each country developed its own sizing system independently. The US uses numeric sizes (0, 2, 4...) for women; the UK uses numbers 4 sizes higher; the EU uses larger numbers based loosely on centimeter measurements.

Do men's and women's sizes convert the same way?

No — men's and women's sizes are completely separate systems even within the same country. Men's {fn} sizes do not correspond to women's {fn} sizes.

What does 'vanity sizing' mean?

Vanity sizing refers to the trend of labelling larger garments with smaller size numbers over time. A US size 8 from 2020 is typically larger than a size 8 from 1970, meaning the same number fits a larger body.

Is this US to UK converter free?

Yes. Unitafy is completely free, requires no registration, and works on any device.

Should I always try clothes on?

Yes — size charts are guides only. The same size label varies between brands, cuts, fabrics, and manufacturing batches. Always check retailer return policies when buying internationally online.

👕 US to UK Size Converter

US to UK clothing size conversion.

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Result

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FormulaVaries by size

Quick Reference — Women's Tops

0→6

2→8

4-6→10-12

8-10→14-16

⚠ Sizes vary by brand and garment. Use as a starting point — always check brand size guides.

Size Examples

Women's XS

US: 0 → UK: 6

Smallest standard women's size.

Women's M

US: 4-6 → UK: 10-12

Most common women's size range.

Men's M

US: M → UK: M

Most common men's size — but US/EU/UK differ.

Women's XL

US: 12-14 → UK: 18-20

Plus size range begins here in most brands.

US to UK Size Chart

Approximate equivalents — sizes vary by brand. Always check brand-specific guides.

Women's Tops

US	UK
0	6
2	8
4-6	10-12
8-10	14-16
12-14	18-20
16	22

Men's Tops

US	UK
XS	XS
S	S
M	M
L	L
XL	XL
XXL	XXL

Quick Sizing Tips

Women: US + 4 ≈ UK

US 6 ≈ UK 10. US 10 ≈ UK 14. US 14 ≈ UK 18.

Men: Very similar

Men's US and UK sizes in S/M/L/XL are largely the same. Trouser waist in inches matches.

Always verify

Especially for formal wear — tailoring differs significantly between US and UK cuts.

Who Uses This Converter?

Online Shopper

Converts US size to UK size when buying clothing from international retailers.

Traveller

Finds the right UK size equivalent when shopping abroad.

Gift Buyer

Converts a known clothing size to the recipient's local size system.

Fashion Retailer

Adds size conversion charts to product listings for international customers.

Personal Stylist

Helps clients navigate sizing when sourcing from international designers.

Returns Department

Converts reported sizes to process international returns correctly.

Related Converters

US to EU EU to US EU to UK UK to US UK to EU International to US International to EU International to UK Shoe Size Converter All Clothing Size Converters

Frequently Asked Questions

About US and UK Sizing

US Sizes

US clothing sizes use a numeric system (0, 2, 4, 6...) for women's tops and a letter system (XS–XXL) for both men and women. Women's US sizes have no direct mathematical relationship to body measurements — a US size 8 varies by brand, era, and garment type.

US women's sizing has experienced significant 'vanity sizing' inflation: a dress labeled US 12 in 1970 fits a body that would have worn a 16 then. The US has no standardized national clothing size system — sizes are brand-defined.

Interesting fact: 'US Size 0' was created in the 1980s as brands extended their ranges downward. The original US size 0 was a size 8 from the 1950s standard — meaning average bodies now fit sizes that would have been impossible in earlier decades.

UK Sizes

UK clothing sizes traditionally run 2 sizes above US women's sizes (US 8 ≈ UK 12). UK men's sizes largely match US sizes in letters (S/M/L/XL) but differ for trousers (waist in inches vs US waist/length). UK children's sizing uses age.

UK high street brands like Marks & Spencer, Next, and ASOS have contributed to defining UK sizing conventions. Like the US, UK sizing is not nationally standardized and varies significantly by brand and decade.

Interesting fact: UK women's size 10 is a US size 6 and an EU size 38 — all referring to similar body measurements but using incompatible numbering systems. This is why online international shopping generates so many size complaints.

About US to UK Clothing Size Conversion

Clothing sizes are not internationally standardized. US and UK sizes use different scales — the same body measurement corresponds to different size numbers in each system. Women's US sizes run 2–4 numbers below UK; EU sizes use larger numbers based on body measurements in cm. Men's sizing is more consistent in S/M/L/XL across regions, but numeric trouser sizes differ.

Always treat size conversions as a starting point. Brand-specific size guides, body measurement charts, and checking retailer return policies are essential for international online shopping.