Convert clothing sizes between letter sizes (XS-XXL), US, UK, EU and IT sizing for men and women — pick a size and see the equivalent instantly.
This free clothing size converter translates a standard letter size (XS through XXL) into its typical numeric equivalents across four widely used sizing systems — US, UK, EU, and IT (Italy) — with separate charts for men's and women's clothing. Clothing sizes are labeled very differently around the world: a "Medium" in the US doesn't map to the same number as a "Medium" in the UK, EU, or Italy, and men's and women's numbering scales aren't related to each other at all. Pick a gender and a letter size, and every equivalent number updates instantly.
Select Men or Women, then choose a letter size from XS to XXL. The calculator looks up that exact size in the matching reference chart and displays the equivalent US, UK, EU, and IT numbers side by side, with no button click required. It is a direct lookup against a published size reference table, not a measurement-based fit calculator — it doesn't ask for your chest, waist, or hip measurements.
This tool is built for anyone who knows their usual letter size and needs the matching number on a different country's scale — international online shoppers, travelers browsing local stores abroad, gift-buyers guessing a size for someone overseas, resellers listing secondhand items on cross-border marketplaces, and anyone comparing a garment tag against a size chart written in an unfamiliar system.
International sizing varies not just by country but by brand and even by garment type within the same brand, so the figures here are a general reference point rather than an exact match for every retailer. When shopping from an overseas store, use this converter as a starting guide and check the specific brand's own size chart or measurements whenever it's available for the most reliable fit.
Why this converter uses lookup tables instead of a math formula
Unlike a BMI or interest calculator, clothing size conversion isn't derived from a formula — there's no single equation that turns a US size into a UK, EU, or IT size for every garment. Instead, this converter stores two fixed reference tables (one for men, one for women), each with six rows — one per letter size from XS to XXL. When you pick a gender and a letter size, the calculator simply finds the matching row and reads off the US, UK, EU, and IT numbers stored in it. There's no interpolation between sizes and no calculation involved beyond a direct table lookup.
Each letter size maps to a fixed row of pre-defined numbers. The calculator retrieves that row rather than computing a result mathematically.
Men's and women's clothing use entirely different numbering conventions, so switching the gender toggle switches to a completely different table, not an adjusted version of the same one.
Because it's a simple table lookup, the result panel updates the moment you change the letter size or gender — no calculation delay or button press needed.
From selecting a gender to reading your converted size
Click the Men or Women toggle button so the calculator reads from the correct size chart — men's and women's numbers for the same letter size are unrelated.
Pick a letter size — XS, S, M, L, XL, or XXL — from the dropdown menu.
The result panel updates immediately, showing the matching Letter, US, UK, EU, and IT sizes — there's no Calculate button to press.
Read across the result boxes to see the equivalent numeric size in each of the four systems side by side.
Switch the gender toggle or letter size at any time to instantly look up a different conversion, then cross-check the result against the specific brand's own chart when precision matters.
Two lookups using the calculator's own reference tables
Suppose you normally wear a women's US size 8 top and you're ordering from a UK-based retailer that lists sizes in UK numbers.
Suppose you wear a men's Medium shirt at home and want to know what to order from a European store.
Explanation: Both scenarios are simple row lookups, not calculations. Notice that in the men's table the EU and IT numbers match exactly (48 and 48), while in the women's table the IT number runs 4 points above the EU number (44 vs. 40) — a real difference between the two reference tables built into this converter, which is why checking both columns matters when shopping specifically from an Italian retailer.
What each column in the result panel means
| Output | What It Means | Example (Women's M) |
|---|---|---|
| Letter | The standard alpha size you selected, from XS to XXL. | M |
| US | The numeric size on the US scale for the selected gender's chart. | 6 |
| UK | The numeric size commonly used by UK high-street retailers. | 10 |
| EU | The numeric size used across most continental European retailers. | 38 |
| IT | Italy's own numbering, which can run higher than the general EU number, especially in women's wear. | 42 |
Why the numbers don't match across systems: each country's clothing size scale grew out of its own historical body-measurement surveys and retail conventions, so there's no universal formula converting one to another — only published reference tables like the one this calculator uses.
Why clothing sizing isn't perfectly standardized even within one system: a "Medium" or "US 8" is a target, not a guarantee. Cut, fabric, garment category, and brand-specific grading all shift the actual measurements behind the same label, which is why two brands' Mediums can fit noticeably differently even after converting between systems correctly.
This converter provides a general reference for informational purposes only. It is not a substitute for a specific brand's own size chart, body measurements, or trying an item on. Results may vary between brands, garment categories, and even between production runs of the same garment.
Where converting between letter and numeric clothing sizes is genuinely useful
Confirm the right number to select before ordering from a UK, EU, or Italian retailer's website.
Quickly translate your home size into the local numbering system while browsing stores overseas.
Estimate the right size when buying clothing for someone whose usual letter size you already know.
List accurate cross-system size details when selling secondhand clothing to overseas buyers.
Learn the local size scale quickly after relocating somewhere that uses a different sizing system.
Study how international size charts relate to each other as part of coursework or industry training.
Translate a client's known size quickly while sourcing garments from international brands.
Help customers understand size conversions when a store carries both domestic and imported lines.
Cross-reference an older or imported size tag against a current, more familiar numbering system.
Answer buyer questions about size equivalence when handling international customer support.
Translate sizing details when reviewing or comparing international brands for an audience abroad.
Quickly cross-reference a customer-provided foreign size tag against a familiar scale before fitting.
What this clothing size converter does well, and where it can't replace a brand's own chart
The exact US, UK, EU, and IT size tables used by this converter
| Letter Size | US (Men) | UK (Men) | EU (Men) | IT (Men) |
|---|---|---|---|---|
| XS | 34 | 34 | 44 | 44 |
| S | 36 | 36 | 46 | 46 |
| M | 38 | 38 | 48 | 48 |
| L | 40 | 40 | 50 | 50 |
| XL | 42 | 42 | 52 | 52 |
| XXL | 44 | 44 | 54 | 54 |
| Letter Size | US (Women) | UK (Women) | EU (Women) | IT (Women) |
|---|---|---|---|---|
| XS | 2 | 6 | 34 | 38 |
| S | 4 | 8 | 36 | 40 |
| M | 6 | 10 | 38 | 42 |
| L | 8 | 12 | 40 | 44 |
| XL | 10 | 14 | 42 | 46 |
| XXL | 12 | 16 | 44 | 48 |
Summary: This clothing size converter gives you an instant, free lookup across US, UK, EU, and IT sizing for men's and women's letter sizes — a useful starting reference, not a guaranteed fit. Pair it with the Shoe Size Converter and a brand's own size chart for a more complete, reliable picture before you buy.
Common questions about clothing size conversion
Official and reference sources to complement this calculator — not a substitute for a brand's own size chart
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