Choose numeric size (0–20) or letter size (XS–XXL) first — they're two separate charts, not the same thing written differently. Then pick your size in any system to see it in the others.
A US 6 dress size converts cleanly on paper — it's an EU 38, a UK 10, an IT 42 — but none of those numbers describe an actual body measurement the way a shoe's foot length or a bra band's inch measurement do. They're labels a brand chooses to put on a garment, and different brands have drifted apart over decades of "vanity sizing," where the same label quietly gets cut larger over time.
Letter sizes (XS–XXL) are looser still: a "Medium" at one brand can be a "Small" or "Large" at another, since there's no numeric anchor at all, just a brand's own judgment call. Use the chart below as a starting point for which size to try on, not a promise of fit — and when a brand publishes its own body measurements, trust those first.
| US | UK | EU | IT |
|---|---|---|---|
| 0 | 4 | 32 | 36 |
| 2 | 6 | 34 | 38 |
| 4 | 8 | 36 | 40 |
| 6 | 10 | 38 | 42 |
| 8 | 12 | 40 | 44 |
| 10 | 14 | 42 | 46 |
| 12 | 16 | 44 | 48 |
| 14 | 18 | 46 | 50 |
| 16 | 20 | 48 | 52 |
| 18 | 22 | 50 | 54 |
| 20 | 24 | 52 | 56 |
| Letter | US | UK | EU |
|---|---|---|---|
| XS | 0-2 | 4-6 | 32-34 |
| S | 4-6 | 8-10 | 36-38 |
| M | 8-10 | 12-14 | 40-42 |
| L | 12-14 | 16-18 | 44-46 |
| XL | 16-18 | 20-22 | 48-50 |
| XXL | 20 | 24 | 52 |
Letter sizes vary wildly by brand — treat this table as a rough starting point only.
A US 6 is an EU 38, a UK 10, and an IT 42 — but treat this as a starting point, since numeric clothing sizes are brand-assigned labels rather than fixed measurements.
Only approximately. Letter sizes are an even looser convention than numeric sizes and vary more between brands, which is why this converter marks every letter-size result as approximate.
"Vanity sizing" — brands have each redefined what a given size number or letter means over the decades, and they don't agree with each other, unlike a shoe or bra band which is tied to an actual measurement.