UK 12 women's size in International (S-XL)
Maintained by the ToolCross team. Conversions follow published US/UK/EU charts; women's body bands follow EN 13402. Charts last verified June 2026.
A women's UK 12 (women's tops & dresses) is International (S-XL) M. Across systems that's US 8, UK 12, EU 40, Japan 11 and international M. Under the EN 13402 body bands that sits around a 88 cm bust and 72 cm waist. Sizing is advisory and varies by brand, so treat this as your starting point.
Sizes around UK 12
Reverse: International (S-XL) M = UK 12. The highlighted row is UK 12.
These follow standard published size charts. Actual fit varies by brand and cut — use the equivalent size as a starting point and check the brand's own chart when you can.
What this means in practice
A UK 12 (International (S-XL) M) lines up with roughly a 88 cm bust (~34.6 in), 72 cm waist and 96 cm hip under the EN 13402 bands. If your bust measures more than about 90 cm you'll usually be more comfortable one size up; under about 86 cm, size down. These are advisory bands — high-street brands vary, so measure rather than trust the label.
How we calculate this
Women's conversions follow widely-published US/UK/EU charts (UK = US + 4, EU = US + 32), and the body-measurement guidance follows the EN 13402-3 body bands (4 cm girth steps). For UK 12 that anchors on a 88 cm bust / 72 cm waist band. EN 13402 sizing is advisory, not absolute — it standardises the size systems, not every brand's cut.
Reviewed against published size charts. Charts last verified June 2026.
Common questions
Is UK 12 the same as International (S-XL) M?
Yes — a women's UK 12 corresponds to International (S-XL) M. Across systems: US 8, UK 12, EU 40, Japan 11, M.
What body measurements does UK 12 map to?
Around a 88 cm bust, 72 cm waist and 96 cm hip under the EN 13402 bands. If you're between sizes, compare your own measurements rather than the label.
How do I convert International (S-XL) M back to UK?
International (S-XL) M = UK 12. The conversion works the same in both directions.
Why might my converted size still not fit?
Conversions line up the size systems, not every brand's cut. Two garments labelled the same can fit differently, so use this as a starting point and check the brand's own chart.
Full size charts, how-to-measure guide & FAQ
How clothing size systems relate
The US and UK use numbers (or chest inches for menswear), the EU uses its own numeric scale, and Japan mixes numbers and letters. Most of the world also labels garments S / M / L / XL. Women's and men's systems do not convert the same way, so use the matching chart below. Fit still varies by brand — treat the equivalent size as your starting point.
Women's size conversion chart (tops & dresses)
| US | UK | EU | Japan | Intl |
|---|---|---|---|---|
| 0 | 4 | 32 | 5 | XS |
| 2 | 6 | 34 | 7 | XS |
| 4 | 8 | 36 | 7 | S |
| 6 | 10 | 38 | 9 | S |
| 8 | 12 | 40 | 11 | M |
| 10 | 14 | 42 | 13 | M |
| 12 | 16 | 44 | 15 | L |
| 14 | 18 | 46 | 17 | L |
| 16 | 20 | 48 | 19 | XL |
| 18 | 22 | 50 | 21 | XXL |
Women's tops/dresses: UK = US + 4, EU = US + 32. Japan and the S–XL band follow published charts. Example: US 8 = UK 12 = EU 40 = Japan 11 = M.
Men's size conversion chart (tops & suits)
| US | UK | EU | Japan | Intl |
|---|---|---|---|---|
| 34 | 34 | 44 | S | XS |
| 36 | 36 | 46 | S | S |
| 38 | 38 | 48 | M | M |
| 40 | 40 | 50 | L | L |
| 42 | 42 | 52 | LL | XL |
| 44 | 44 | 54 | LL | XL |
| 46 | 46 | 56 | 3L | XXL |
| 48 | 48 | 58 | 4L | XXXL |
Men's tops/suits use chest size in inches: US = UK, EU = US + 10. Japan uses letter sizes. Example: US 40 = UK 40 = EU 50 = Japan L.
How to find your size before you buy
- Measure your chest/bust at the fullest point with a soft tape, kept level and snug.
- For menswear, that chest measurement in inches is your US/UK size; add 10 for EU.
- For womenswear, find your usual home size in one column and read across for the rest.
- If you're between two sizes, size up for outerwear and tailored fits.
FAQ
A US women's 8 is a UK 12 and an EU 40 (Japan 11, international M). The same dress measurement simply carries a different number in each country's system.
A US men's 40 (40-inch chest) is the same as a UK 40 and an EU 50 — and roughly a Japanese L. EU menswear is normally your inch chest size plus 10.
No. Women's tops/dresses use one numeric system (UK = US + 4, EU = US + 32) while men's tops/suits use chest inches (US = UK, EU = US + 10). Always use the chart that matches the garment.
Conversions line up the size systems, not every brand's cut. Two labels at the same EU 40 can fit differently. Use the equivalent size as a starting point and check the brand's own chart.