Clothing Size Conversion Calculator

A clothing size conversion calculator converts a known clothing size from one country's sizing system into its closest match in another system. This guide covers the size relationship between the United States, United Kingdom, European Union, Japan, Korea, Russia, and Mexico, and explains how that relationship changes across women's, men's, children's, infant, maternity, petite, plus, and junior sizing.

It also covers which body measurement decides the fit of each garment type, how a size can be estimated from height and weight instead of measurements, why the same numeric size still differs from country to country, why one chart cannot cover every garment type, and why brands often disagree with any general chart. The calculator above gives a fast numeric answer. The sections below explain the reasoning behind that answer and the mistakes worth avoiding along the way.

How Do You Convert Clothing Sizes Between US, UK, and EU Systems?

UK clothing sizes typically run about four numbers above the equivalent US size for women's clothing, while EU sizing follows a completely different numbering logic, generally in the 32 to 52 range depending on the garment. These offsets hold as a general pattern rather than a fixed rule, since the exact gap changes by garment type and by brand. The three sections below break down each pairing on its own.

What Is the US to UK Clothing Size Conversion?

For women's clothing, UK sizes generally run four numbers above the US size for the same body, so a US size 8 is close to a UK size 12. Men's clothing follows a different pattern. Most men's jackets and tailored tops keep the same number in both the US and UK, since both systems label jackets by chest measurement in inches rather than by a separate numbering scale. Pants and jeans labeled by waist inches, such as W32, also carry over directly between the two countries.

What Is the US to EU Clothing Size Conversion?

EU clothing sizes use a different numbering logic than the US or UK, generally running 30 to 32 numbers above the equivalent US size for women's clothing. A US size 8 is commonly close to an EU size 40. For men's clothing, EU jacket sizes are usually about 10 numbers above the US or UK chest-inch label, so a men's US 40 jacket is generally close to an EU 50.

What Is the UK to EU Clothing Size Conversion?

The UK to EU pairing is the most consistent conversion of the three covered above, since both systems use a numeric scale rather than mixing letters and numbers. A UK size 12 is generally close to an EU size 40. Following one size across all three systems on this page, a US 8, a UK 12, and an EU 40 typically describe the same body.

How Do You Convert Clothing Sizes to Japan, Korea, Russia, and Mexico?

Sizing outside the US, UK, and EU cluster follows its own logic in each country. Japan uses a numeric scale distinct from EU numbering, and a US size 8 top is commonly close to a Japan size 13. Korea uses a separate banded scale, most often shown as 44, 55, 66, 77, and 88 in place of XS through XL. Russia's clothing scale generally sits close to the EU number with a small offset that shifts by garment type. Mexico uses its own adult clothing scale that does not map directly onto US letter sizes, so a shopper ordering from a Mexican retailer should not assume a straight S, M, L match to their usual size.

These figures are general estimates and can shift by brand and garment type.

How Do Clothing Size Conversions Differ Between Men, Women, Children, and Other Categories?

Gender, age, and body category each use a separate scale with its own anchor measurement, which is why no single chart covers every shopper. Beyond the standard men's and women's numbering, retailers also run parallel systems for children, infants, maternity wear, and petite, plus, and junior fits, each built on a different proportion rule. The sections below break down each category on its own.

How Do Women's Clothing Sizes Convert Across Countries?

Women's clothing generally runs from a US size 0 to a US size 16 in regular sizing, a UK size 4 to a UK size 20, and an EU size 32 to an EU size 48. Because women's sizing is the category most affected by vanity sizing, the label number alone is the least reliable part of the conversion. Checking the bust, waist, and hip measurement behind a size gives a more dependable result than matching the number across countries.

How Do Men's Clothing Sizes Convert Across Countries?

Men's jackets and tailored tops are generally labeled by chest measurement in inches, which is why the US and UK numbers usually match directly for the same body. EU jacket sizing typically adds about 10 to that chest-inch number, so a US 40 jacket is close to an EU 50. Pants and jeans follow a separate waist-inch label such as W32, which again transfers directly between the US and UK. Knit or stretch garments such as t-shirts and jumpers are commonly sold in S, M, L format, while structured pieces such as blazers use the precise numeric chest scale, so the same brand can label two garment types in two different ways.

How Do Children's Clothing Sizes Convert Across Countries?

Children's clothing between about 3 and 14 years old is labeled differently in each system. The US commonly uses age or a T-number such as 4T, the UK mixes age and year labels, and the EU uses the child's height in centimeters. Because children of the same age can vary widely in height, the centimeter height figure gives a more reliable match across systems than age alone.

How Do Infant and Baby Clothing Sizes Convert Between Countries?

Infant sizing, covering roughly newborn to 24 months, grows on a faster and finer scale than older children's sizing, since babies change size in weeks rather than years. Most systems label infant sizes by month range, such as 0-3 months, 3-6 months, or 6-9 months, rather than by a single age figure. The EU commonly labels the same age range by height in centimeters instead. Because weight and length grow at different rates from baby to baby, sizing up slightly for a growth allowance is common practice among parents.

How Do Maternity Clothing Sizes Convert Across Countries?

Maternity sizing is based on a shopper's regular, pre-pregnancy clothing size rather than a current bump measurement, since maternity garments are cut with built-in room that expands through each trimester. The US, UK, and EU number offsets for maternity wear generally mirror the regular women's offset already covered earlier on this page, so a shopper who knows their regular size in one country can carry the same offset over here without needing a separate chart.

How Do Petite, Plus, and Junior Sizing Differ From Regular Sizing?

Petite, plus, and junior sizing are not simply smaller or larger versions of the regular scale. Each follows its own proportion rule. Petite sizing shortens the rise, inseam, and sleeve length for a shorter frame at the same circumference as the regular size. Plus sizing, often shown with a W suffix such as 16W, grows at a different rate between sizes than regular sizing, so a plus size cannot be estimated by simply continuing the regular number sequence upward. Junior sizing uses an odd-number scale such as 3, 5, 7, and 9, cut for a younger, less curved frame than misses sizing.

What Body Measurements Do You Need for an Accurate Size Conversion?

Bust or chest, waist, and hip measurements anchor most clothing conversions across every system covered on this page. A body measurement stays constant regardless of which country's label is on the garment, which makes it a more reliable starting point than converting a size number directly. The three steps below cover how to take each measurement correctly.

How Do You Measure Your Bust or Chest for Size Conversion?

Keep the tape measure parallel to the floor and measure around the fullest part of the chest or bust with arms relaxed at the sides. The tape should sit snug against the body without pulling tight. This measurement controls the fit of tops, dresses, jackets, and shirts, and is usually the first figure checked against any size chart.

How Do You Measure Your Waist for Size Conversion?

Find the natural waist, the narrowest part of the torso, usually just above the navel, and hold the tape level and comfortably loose rather than pulled in. This measurement controls the fit of pants, jeans, and skirts, and is one of the two figures, along with hip, used to calculate a dress size.

How Do You Measure Your Hips for Size Conversion?

Measure around the fullest part of the hips and seat with feet together and the tape held level around the body. This measurement matters most for dresses, skirts, and fitted pants, and is often the deciding figure when a waist measurement and a hip measurement fall into two different rows of a size chart.

Can You Find Your Clothing Size Using Height and Weight Instead of Measurements?

Yes. Some retailers offer a size estimate based on height and weight as a faster alternative to taking bust, waist, and hip measurements. This method cross-references height and weight against a body-type or build selection to suggest a size, rather than matching an exact circumference.

It works reasonably well for simple, stretch-fabric garments such as t-shirts, but it carries a clear limitation: two people with the same height and weight can still have different proportions, so the result is faster to get but less precise than a direct measurement. For fitted or structured garments such as trousers or blazers, and for non-stretch fabric, the bust, waist, and hip measurements covered above give a more dependable result.

Why Do Clothing Size Conversions Vary Between Countries?

Average body proportions also differ by region, and those regional averages shaped each country's original size scale when it was first standardized. Industry bodies publish reference standards for garment sizing, including ISO 8559 from the International Organization for Standardization and EN 13402 from the European Committee for Standardization, though apparel brands are not required to follow either one, which is part of why real-world sizing still varies even within a single country.

What Clothing Size Conversion Charts Should You Use for Different Garment Types?

A size 40 does not mean the same thing across every garment type. A size 40 dress, a size 40 jacket, and a size 40 shoe are each governed by a different measurement anchor and, in some cases, a different standard entirely, which is one of the most common sources of confusion when converting a size. The three charts below separate the conversion by garment category so each figure is compared against the correct anchor.

What Is the Size Conversion Chart for Dresses and Tops?

Dress and top sizing is anchored to bust, waist, and hip ranges rather than the label alone. When a bust measurement and a hip measurement fall into two different rows, the general guideline is to size for the larger measurement in a woven, non-stretch fabric, and to consider sizing down slightly in a stretch fabric that has more give.

What Is the Size Conversion Chart for Pants and Jeans?

Jeans use a W and L labeling convention, where W is the waist measurement in inches and L is the inseam length in inches, so a label such as W32 L34 describes a 32 inch waist with a 34 inch inseam directly, without needing a separate chart. This differs from dress sizing, where inseam is not sold as a separate figure.

What Is the Size Conversion Chart for Jackets and Coats?

Jacket and coat sizing is anchored to chest measurement in inches. The same chest-inch number typically appears on both US and UK labels, while EU labeling adds roughly 10 to that number, so a 40 inch chest is close to a US or UK 40 and an EU 50. Coats are commonly bought one size larger than a fitted jacket to leave room for a sweater or layer underneath, which is worth accounting for when reading the chart below.

Why Do Clothing Size Conversions Vary Between Brands?

Even within a single country, brands do not share one enforced size standard, so a size 8 at one retailer can be a size 10, or a size 6, at another. Three factors explain most of this gap. Vanity sizing is the practice of labeling a garment with a smaller number than its true measurement suggests, done to flatter the buyer, and it varies in degree from brand to brand. Fit model and cut also differ, particularly between fast fashion labels and tailored or designer brands, which are built around different body proportions. A third, newer factor is the difference between a garment measured lying flat and a size based on body measurement. Some direct-to-consumer brands now publish flat garment measurements instead of a body-based size, and that figure does not map onto a standard country conversion chart the way a body measurement does.

The scale of this gap is easier to see with a real figure. Research published in the International Journal of Fashion Design, Technology and Education found that the average American woman's clothing size sits between a US 16 and 18, well above the size 8 to 10 fit models that many brands still design around. That gap between the average body and the sample size a brand builds its pattern from is a large part of why a size chart and a real-world fit can diverge, even before country conversion is factored in. A country-to-country conversion chart is a starting point, not a guarantee, and checking the specific retailer's own size guide before buying remains the more reliable step.

What Common Mistakes Should You Avoid When Converting Clothing Sizes?

A few recurring habits cause most wrong-size purchases, and each is easy to avoid once it is named directly.

Using one flat number offset for every garment. A four-size UK offset that works for a dress does not carry over to a jacket, since jackets are sized by chest measurement rather than the dress scale.

Confusing a shoe size with a clothing size. Shoe sizing and clothing sizing use unrelated numbering systems, so a size 40 shoe and a size 40 dress have no connection to each other.

Trusting an alpha size without checking the numeric range behind it. A medium at one brand can sit in a different numeric range than a medium at another, since letter sizes are not standardized across retailers.

Ignoring fabric stretch when a measurement falls between two sizes. A non-stretch, woven fabric needs the larger of two bordering sizes, while a stretch fabric usually allows sizing down.

Assuming petite or plus sizing continues the regular number sequence. Both categories use their own proportion rules rather than simply extending the regular scale upward.

What Other Sizing Tools Do You Need Alongside a Clothing Size Conversion Calculator?

Clothing size is only one part of getting a full outfit right when shopping across countries. Shoes, bras, hats, rings, and individual body measurements such as neck, shoulder, or sleeve length each follow their own sizing logic that a clothing chart does not cover. The sections below cover each of these separately, along with brand-specific comparisons and general guidance for buying from an international retailer.

How Do You Convert Shoe Sizes Between US, UK, and EU?

Shoe sizing uses an entirely different numeric scale from clothing sizing, so a clothing size 40 and a shoe size 40 carry no relationship to each other. Shoe size is based on foot length rather than body circumference, which is why a US women's size 8 converts to roughly a UK 6 and an EU 39 despite none of those numbers matching her clothing size. For a full breakdown across every country, use the shoe size conversion calculator.

How Do You Find Your Correct Bra Size?

Bra sizing is calculated from band and cup measurements rather than the single bust figure used in dress sizing, which is why a dress size conversion cannot be used to estimate a bra size. Cup letters do not carry the same volume across countries either; a UK D cup is not the same volume as a US D cup, which is a frequent source of confusion when buying from a different country. The bra size calculator walks through the band and cup measurement needed for an accurate result.

How Do You Convert Children's Shoe Sizes Internationally?

Children's shoe sizing runs on its own scale, separate from both adult shoe sizing and children's clothing sizing, and a child's foot length in centimeters is the most reliable anchor since feet grow between size charts quickly. The children's shoe size converter covers the US toddler and youth scale against the EU numeric scale in full.

How Do You Convert Hat Sizes Between Countries?

Hat sizing is based on head circumference and is shown as a centimeter measurement, a US numeric size, or an alpha size depending on the country, which makes it a separate system from clothing sizing entirely. The hat size conversion guide gives the full head circumference to hat size breakdown.

How Do You Convert Ring Sizes Between Countries?

Ring sizing follows its own measurement logic based on finger circumference or diameter, with country-specific letter or number scales that have no relationship to clothing sizing. The ring size conversion calculator covers every major country scale in one place.

How Do You Compare Sizing Between Specific Clothing Brands Like Zara, H&M, and Gap?

Brand-to-brand differences can be just as significant as country-to-country differences. A US size 8 at Gap tends to fit larger than a US size 8 at Zara, for example, due to a combination of vanity sizing and a slimmer European fit model. For a side-by-side comparison across specific retailers, use the brand size comparison tool.

How Do You Measure Your Body Correctly Before Buying Clothes Online?

Taking accurate personal measurements before any online purchase is the single most reliable habit for avoiding a size mismatch, regardless of which country or brand a garment comes from. The bust, waist, and hip steps covered earlier in this guide are the starting point. For a fuller walkthrough, including posture tips and measuring tools beyond a soft tape, see how to measure your body for clothes.

What Should You Know About Sizing When Shopping From International Online Stores?

Shopping from an international online store brings a few practical concerns beyond the size conversion itself. Checking a retailer's return policy before ordering an unfamiliar size, watching for customs or duty costs on any return, and checking whether the product listing shows body measurements directly, which is increasingly common and often more reliable than the size label, are all worth doing before checkout. The international online shopping size guide covers these steps in full.

How Do You Measure Your Shoulder Width for the Right Fit?

Shoulder width is a key fit point for jackets, blazers, and fitted shirts that a chest or bust measurement alone does not capture, since two people with the same chest size can still have different shoulder widths. The how to measure shoulder width guide shows exactly where to place the tape across the back.

How Do You Measure Neck Size for Shirts and Collars?

US dress shirts are commonly labeled by neck size in inches rather than a general S, M, L, which makes neck measurement its own separate step outside the clothing conversion covered earlier in this guide. This measurement matters specifically for shirts, ties, and collared jackets. See how to measure neck size for the full method.

How Do You Measure Sleeve Length for Shirts and Jackets?

Sleeve length is measured separately from chest or bust size, and it matters most for dress shirts and jackets, where a correct chest size can still come with sleeves that run too long or too short. The how to measure sleeve length guide covers the exact measuring point from the back of the neck to the wrist.