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Shapewear Size Conversion Chart
Shapewear letter sizes are the same letters in the US, UK and EU, so XS stays XS and M stays M across those systems. Numeric dress sizes do differ, so the table below pairs each letter with broad US, UK and EU numeric equivalents and with bust and waist ranges in inches. Convert by your measurements first, and use the numeric dress size only as a rough cross check, because brands vary more in shapewear than in most garments.
The conversion table
The letters do the easy work here. Unlike shoes or bras, where US and UK numbers diverge sharply, shapewear letters travel well, and most international brands print the same XS to XXL range on every market. The numbers in the table are the part that needs care, because a US 8 is not a UK 8, and an EU 40 is not a US 40. Keep the letter, convert the number, and check both against your measurements.
| Letter | US numeric | UK numeric | EU numeric | Bust in inches | Waist in inches |
|---|---|---|---|---|---|
| XS | 0 to 2 | 4 to 6 | 32 to 34 | 31 to 32 | 24 to 25 |
| S | 4 to 6 | 8 to 10 | 36 to 38 | 33 to 34 | 26 to 27 |
| M | 8 to 10 | 12 to 14 | 40 to 42 | 35 to 37 | 28 to 30 |
| L | 12 to 14 | 16 to 18 | 44 to 46 | 38 to 40 | 31 to 33 |
| XL | 16 to 18 | 20 to 22 | 48 to 50 | 41 to 43 | 34 to 36 |
| XXL | 20 to 22 | 24 to 26 | 52 to 54 | 44 to 46 | 37 to 39 |
All of the numeric equivalents above are broad general guidance, not brand sizes. A brand that labels its M as US 8 to 10 may cut it closer to a US 6 in practice, and a brand that labels its L as UK 16 to 18 may cut it closer to a UK 14. The bust and waist columns are the anchor, because inches do not change when a label crosses a border.
How to use the table when you shop abroad
Start with the letter you already know, then confirm it with the numeric column for that country. If you wear M in the US and you are looking at a UK site, look for UK 12 to 14 and check that the bust range of 35 to 37 inches and the waist range of 28 to 30 inches match your own numbers. If the UK site lists only a letter, the M should be close, but still open the brand chart and compare the full row.
Be extra careful with sites that mix systems on one page. Some list a US number, a UK number and an EU number side by side, and some list only one of them while using a letter that belongs to another system. When the numbers disagree with each other, trust your bust and waist in inches over any of them, and message the seller or check the returns policy before you order.
Converting from a dress size
Many shoppers start from a dress size because it is the number they know best, and that is a reasonable starting point as long as you treat it as rough. Find your dress size in the table, read across to the letter, and then check that letter against your bust, waist and hips. If the dress size points to M but your hips point to L, the hips win for shapewear, because the garment has to fit the widest area it covers.
Dress sizes are also graded differently by every brand, so a dress size that fits you in one shop can be a size off in another. Shapewear adds compression on top of that variation, which makes the dress size even less reliable as a sole guide. Use it to narrow the choice to one or two letters, then let your measurements pick between them.
Why shapewear conversion is less exact than other garments
Most garments are cut to a body shape that is fairly stable across brands, but shapewear is cut to a body shape plus a level of squeeze, and brands disagree on both. One brand may aim for a gentle smoothing hold in every size, while another aims for a firm hold, so the same letter can feel like two different garments. Torso length adds more variation, because a brand that cuts for a long torso will feel loose at the shoulders on a short torso, even when the waist and hips match.
Stretch makes the picture fuzzier still. A very stretchy fabric can cover two sizes in one letter, while a firm panel with little give needs a close match. That is why two converted sizes that look identical on paper can feel different on the body, and why the brand chart and the fabric description matter more than the conversion table once you have narrowed the choice down.
Three conversion mistakes to avoid
- Copying a US number straight onto a UK site without adding the usual gap.
- Converting by dress size alone and skipping bust, waist and hips.
- Assuming the letter guarantees the same torso length in every country.
- Ignoring compression level, which changes how a converted size feels.
- Ordering from a site with no returns policy for shapewear.
If a conversion leaves you between two letters, the safer choice is usually the larger one, especially for firm or extra firm compression and for bodysuits. A larger converted size still smooths, while a smaller one pinches at the edges and rolls at the waist. Try the larger size at home first, sit and walk in it, and only keep it if the edges stay flat and the breathing stays easy.
Shapewear sizing tool
Use the Shapewear Size Calculator
Enter your measurements to confirm a converted size before you order abroad.
Frequently Asked Questions
Are US, UK and EU shapewear sizes the same?
For letter sizes they usually are, with XS to XXL meaning roughly the same range in each system. Numeric dress sizes still differ, so convert by your bust and waist measurements, not by the number alone.
What is an M in shapewear in numeric sizes?
As a broad guide, M lines up with a US dress size around 8 to 10, a UK size around 12 to 14, and an EU size around 40 to 42. Brands vary, so treat those numbers as a starting point only.
Should I convert from my dress size or my measurements?
Use your measurements. Dress sizes are graded differently by every brand, while bust, waist and hips in inches give the conversion chart something real to match.
Why does the same converted size fit differently in two countries?
Brands in different countries often cut for different torso lengths and hip shapes, even when they use the same letter. The letter converts, but the cut underneath it does not always follow.
Do I need a different size for firm compression when converting?
Not always, but firm and extra firm compression feel tighter in the same converted size. If your measurements sit near the top of a row, choose the larger size for firm compression.