Clothing Size Converter

Converting a size takes four choices, and the size list updates itself as you pick. The tool shows the matching size in all three systems at once, so you can shop in any store.

1. Pick whether the clothes are for women or men.
2. Pick the garment, either tops and dresses or bottoms and trousers.
3. Pick the system your size comes from, US, UK or EU.
4. Pick your size from the list, then press Calculate to see the US, UK and EU equivalents and the letter size.

Clothing sizes are not one worldwide standard. Each region built its own numbering, so conversion is a lookup in a standard table, not a single formula. The tables on this page follow the ASTM D5585 body measurements for women and the ASTM D6240 body measurements for men.

For women numeric sizes the rules are simple. A UK size is the US size plus 4, and an EU size is the US size plus 32. A US 8 is a UK 12 and an EU 40. For men, the US and UK use the same chest or waist measurement in inches, while EU sizes use centimetres, so an EU suit size runs about 10 higher than the chest in inches and an EU trouser size runs about 16 higher than the waist in inches.

Take a women US size 8 in tops and dresses. Add 4 for the UK size. 8 + 4 = 12. Add 32 for the EU size. 8 + 32 = 40. The letter size for US 8 to 10 is M. So a US 8 converts to UK 12, EU 40, letter M.

Check it the other way. An EU 40 minus 32 is a US 8, and a UK 12 minus 4 is also a US 8.

The same numeric table covers tops, dresses and bottoms for women. Bust, waist and hip measurements decide the letter size when you sit between two numbers, so measure yourself and compare with the brand chart.

Men bottoms are simpler. The waist in inches is the same in the US and the UK, and the EU trouser size is the waist plus 16. A US 32 waist is an EU 48 and a US 36 waist is an EU 52.

These tables are the standard starting point, but brands cut their clothes how they like. One brand size 8 can fit like another brand size 10. Use the converted size to narrow the choice, then check the brand own size chart against your body measurements before you order. Measure your chest, waist and hips first. The length converter turns inches into centimetres when a chart uses the other unit.