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Overalls Size Conversion Chart
Overalls sizes convert across US, UK and EU systems, with the size letter or number shifting by system while your waist and hip measurements stay the same. Convert from your measurements, not from a size letter, because brands grade differently. The chart below gives broad adult conversions as a starting point, and the brand chart is always the final check.
Convert from measurements, not letters
A size letter is a shortcut, and shortcuts fail across systems. A US M and a UK M are usually close, but an EU size uses a different number scale. Your waist and hip numbers do not change across systems, so they are the reliable bridge.
Measure first, then find your measurements in the chart for the system you are shopping in. If you only know your usual letter, measure anyway before you convert. Two people who both wear a US M can have different waists and hips, and only the measurements show which converted size each needs.
The general conversion chart
The table below gives broad adult conversions across US, UK and EU systems, with waist and hip ranges in inches. Find your measurements in the column for the system you are shopping in.
| Size | US | UK | EU | Waist in inches | Hips in inches |
|---|---|---|---|---|---|
| XS | 0 to 2 | 4 to 6 | 32 to 34 | 24 to 25 | 34 to 35 |
| S | 4 to 6 | 8 to 10 | 36 to 38 | 26 to 27 | 36 to 37 |
| M | 8 to 10 | 12 to 14 | 40 to 42 | 28 to 29 | 38 to 39 |
| L | 12 to 14 | 16 to 18 | 44 to 46 | 30 to 32 | 40 to 42 |
| XL | 16 to 18 | 20 to 22 | 48 to 50 | 33 to 35 | 43 to 45 |
| XXL | 20 to 22 | 24 to 26 | 52 to 54 | 36 to 38 | 46 to 48 |
These are general conversions, not brand sizes. Some brands skip numbers, some use only letters, and some cut for a different fit block. Treat the table as a starting point and confirm it against the brand chart.
Why conversions go wrong
Conversions go wrong most often when a shopper converts a letter instead of a measurement. A US 8 in one brand can match a UK 12 in another, and a vanity sized brand can label a generous cut with a smaller number. The letter is the least reliable part.
Fit block differences cause the rest of the errors. A brand that cuts a relaxed bib and wide leg will feel different from a brand that cuts a slim bib and tapered leg, even when both claim the same converted size. Check the bib width and leg style notes too.
Shopping across systems online
When you shop on a site that uses a different system, open its size chart and find your waist and hip numbers in its rows. Do not trust a single conversion line in a product description, because descriptions are often copied between markets without updating them.
Also check the inseam units. Some charts list inseam in inches and some in centimetres, and a 30 inseam means something very different in each unit. Confirm the unit before you order, and check the return policy first.
Overalls sizing tool
Use the Overalls Size Calculator
Enter waist, hips, inseam and height measurements to estimate a starting overalls size.
Frequently Asked Questions
Is a US M the same as a UK M?
Usually close, but not always. Brands grade differently, so check your waist and hip measurements against the brand chart instead of trusting the letter.
Do EU overalls sizes use numbers?
Mostly yes. EU sizes are usually numbers such as 40 or 42, while US and UK sizes use letters or smaller numbers. Convert from your measurements.
Why does the same size fit differently in another country?
Different brands and fit blocks, not just different labels. The cut, the bib width and the denim stretch all change the fit.
Should I convert waist or hips?
Both. Find the size where both measurements fall, and use the larger size when they point to different sizes.
What if the brand only lists letters?
Use the general chart to find the letter that matches your measurements, then check the brand chart for bib width, inseam and stretch notes.