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Clothing Size Converter

Convert between US, UK, EU, Italian, Australian, French, and Japanese sizes — for women, men, and kids. Enter measurements for a confidence-matched recommendation.

Gender
Category
Units:
Convert by Size
Or Enter Measurements
Fit Preference
Women's Tops
M
Bust: 36–37.5 in · Waist: 28–30 in
✓ Perfect Fit
US
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UK
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EU
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IT
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AU
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FR
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JP
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Measurement Ranges by Size
Chart: measurement ranges by size.
Women's Tops From: US Regular

Women's sizing uses numeric (US 0–24) and letter (XS–3XL) scales. The highlighted row matches your current converter selection.

Tops & Dresses
Bottoms & Pants
Brand Fit Notes
Zara
Runs Small
Generally size up 1 from US sizing. EU sizing used on labels.
H&M
True to Size
Follows standard EU sizing. Consistent across most categories.
ASOS
True to Size
UK sizing. Converts cleanly — US 8 = UK 12 = AU 12.
Uniqlo
Runs Small
Japanese sizing. Size up 1–2 sizes for comfortable fit.
J.Crew
Runs Large
US sizing, tends to run generous. Consider sizing down 1.
Measurement Tips
Bust / Chest
Measure around the fullest part of the chest. Keep tape parallel to floor. Breathe normally — don't hold your breath. Arms relaxed at sides.
Waist
Find the narrowest part of your torso, 1–2 inches above the navel. Exhale gently and measure without pulling tight.
Hip
Stand with feet together. Measure the fullest part of your hips — usually 7–9 inches below the waist. Keep tape level around.

Men's clothing uses letter sizes (XS–3XL) for tops and numeric waist sizes (28–40) for bottoms. EU numeric sizes reflect chest circumference in cm.

Tops & Shirts
Bottoms & Pants (Waist Size)
Brand Fit Notes
Ralph Lauren
Runs Large
US sizing, fits generously. Consider sizing down for tailored looks.
Zara Man
Runs Small
European cut, size up 1 from your US/UK size.
Uniqlo
Runs Small
Japanese sizing, typically 1–2 sizes smaller than US standard.

Kids' clothing uses age-based sizing globally. Sizes shown are for general tops — always check the child's height and chest measurement for best accuracy.

Kids Tops (Age-Based)
Measurement Tips for Kids
Height
Stand child against a wall, feet flat. Mark the top of the head and measure from floor to mark. Most accurate for EU/UK kids sizing.
Chest
Measure around the fullest part of the chest with arms relaxed. Key for tops and outerwear fit.
Age vs. Size
Kids grow at different rates — always use measurements over age. A tall 5-year-old may fit 7-year clothes, and that's normal.
Save a Profile
Store your measurements for quick future conversions. Up to 3 profiles.
My Profiles
Click "Quick Convert" to instantly run a size conversion from your saved measurements.
Recent Conversions
Last 5 conversions from this session. Click "Load" to restore any result.
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How to Use This Calculator

1

Choose Gender & Category

Select Women, Men, or Kids, then pick Tops, Bottoms, or Dresses. The size chart and measurement fields update automatically.

2

Convert by Size or Measurement

Either select your known size from a dropdown, or enter your bust/waist/hip measurements in inches or cm for a measurement-matched result.

3

Read Your Results

The confidence badge (green/amber/red) tells you how well your measurements match. A gold bar on the chart highlights your size across all 7 systems.

4

Save & Share

Save your measurements to a profile for one-click future lookups, or share a URL that pre-fills all your settings for teammates or shopping partners.

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Frequently Asked Questions

Basics What is a US size 12 in EU?
A US women's size 12 is typically equivalent to EU size 42–44. The general formula is EU ≈ US + 30 for tops and tops-dresses, but this varies by brand. Measuring your bust (36–38") and checking the brand's actual size chart is the most reliable approach.
Advanced Is UK size the same as US size?
No. UK women's numeric sizes are typically 4 numbers lower than US equivalents — US 8 = UK 12. Letter sizes (S, M, L) are generally the same between US and UK, though fit may differ slightly due to different body proportion assumptions used in pattern grading.
Advanced Why do the same measurements give different sizes in different brands?
There is no universal clothing size standard. Each brand builds its size chart around a specific fit model — their target customer's proportions. A size 8 at J.Crew fits differently than H&M or Zara. This is why body measurements in inches or centimeters are always more reliable than size labels when cross-shopping brands.
Basics How do I measure myself accurately?
Use a soft measuring tape. Bust: fullest part of the chest, tape parallel to floor, arms relaxed. Waist: narrowest part of the torso, 1–2 inches above navel, exhale gently. Hip: fullest part, 7–9 inches below waist, feet together. Measure twice — small errors compound across conversions.
Advanced How do Japanese clothing sizes compare to US?
Japanese women's clothing uses numeric equivalents (5, 7, 9, 11, 13, 15) that run 2–3 sizes smaller than US. A US M (size 8–10) is roughly Japanese 11–13. Japanese XL is approximately US S–M. Always size up and check the brand's specific measurements in cm.
Basics What is the confidence badge in this calculator?
The confidence badge shows how well your entered body measurements match the suggested size's defined range. Green "Perfect Fit" means your measurements are centered within the size band. Amber "Between Sizes" means one or more measurements are near a boundary — the sister sizes card shows adjacent options. Red "Out of Range" means no size fits well based on the entered measurements.
Strategy When should I pick Fitted vs. Relaxed fit preference?
Choose Fitted when you want form-fitting silhouettes, stretch fabrics, or you tend to prefer the smaller size when between two. Choose Relaxed for casual wear, stiff wovens (linen, denim), layered outerwear, or when you prefer ease of movement. Regular is the default and picks the best direct match without shifting.
Basics What is vanity sizing?
Vanity sizing is the practice of relabeling larger garments with smaller size numbers — making customers feel they wear a smaller size without actual measurement changes. US sizing has drifted significantly since the 1950s: a modern US size 8 fits the measurements that were a US size 14 in the 1950s. This is also why vintage clothing runs much smaller than modern equivalents.
Advanced Why doesn't Australian sizing match EU or US exactly?
Australian sizing uses the same numeric values as US sizes but corresponds to UK size equivalents. AU 12 = US 8 = UK 12. Australia officially adopted a clothing standard in the 1970s based on UK sizing. However, global brands selling in Australia often use their own international charts, so always verify with the specific retailer.
Advanced How do men's bottoms sizes work internationally?
US and UK men's pants use waist size in inches (e.g., 32×32 means 32" waist, 32" inseam). EU sizes use waist circumference in centimeters — EU 42 ≈ US/UK 32". Italian (IT) adds a small offset. Japanese sizing uses centimeter waist measurements labeled differently (e.g., JP 76 ≈ US 32"). Always check the waist measurement in cm for the most direct comparison.
Basics What is plus size in different countries?
Plus size definitions vary globally. In the US, plus typically begins at size 14–16 (W sizes or 1X). UK plus generally starts at size 20. EU plus sizes begin around EU 46–48. Many brands now use extended sizing without a separate plus designation, integrating all sizes into one continuous range.
Advanced Why do my measurements fall in different sizes for tops vs. bottoms?
This is extremely common. Most people's bodies don't match the proportions assumed by standard sizing patterns. If you have a larger bust relative to your waist, you may be a different size in tops vs. bottoms. The calculator handles this by evaluating tops and bottoms with separate measurement keys (bust for tops, waist/hip for bottoms).
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Formula & Methodology

EU ≈ US + 30–32 (women's tops)

European sizes run 30–32 numbers higher than equivalent US sizes. US 8 → EU 38, US 10 → EU 40. Bottoms use a different offset.

Confidence = weighted match score (bust · waist · hip)

Each measurement within a size range scores +2. Within ±1 unit of the boundary scores +1. Outside scores −1. Normalized to 0–100.

1 in = 2.54 cm

All internal data stored in inches. The cm/in toggle converts input values and display ranges in real-time.

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Key Terms Explained

Bust Measurement Circumference of the fullest part of the chest, measured horizontally across the nipples with arms relaxed and tape parallel to the floor.
Waist Measurement Circumference at the natural waist — the narrowest part of the torso, typically 1–2 inches above the navel.
Hip Measurement Circumference at the fullest part of the hips, usually 7–9 inches below the waist. Stand with feet together for accuracy.
Vanity Sizing The practice of labeling larger garments with smaller size numbers. US sizes have shifted significantly since the 1950s — a modern US 8 was a 1950s US 14.
Sister Sizes Adjacent sizes with the same or similar body volume but different proportions. If between sizes, a sister size may provide a better fit than the midpoint size.
Confidence Score This calculator's measure of how well your entered body measurements fall within a given size's defined measurement range. Green = center of range, Amber = near boundary, Red = no match.
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Real-World Examples

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US Women's M -- Shopping in Europe

Bust: 36 in, Waist: 28 in

Scenario: US M converts to EU 40-42.

Result: Order EU 40 for tops, EU 42 if the brand runs small (e.g. Zara).

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International Clothing Sizes: A Complete Guide

Clothing size standards vary dramatically across the world, making international online shopping a consistent source of frustration and expensive return shipping. A US size 8 is not a UK size 8, an EU size 38, or an Asian medium — and even within countries, brand-to-brand variation can span a full size or two. Understanding how sizing systems work gives you the tools to shop confidently and avoid costly mistakes.

How US Sizing Works

US women's clothing uses a numeric system (0, 2, 4, 6, 8…) historically based on measurements standardized by the National Bureau of Standards in 1958. Today, manufacturers set their own standards. Vanity sizing has inflated what sizes mean — a modern US size 8 corresponds to measurements that were size 14 in the 1950s. This is why vintage clothing runs far smaller than modern equivalents. Men's sizing is more logical: shirts labeled by neck size (15, 15.5") and chest, pants by waist and inseam — but even here, brands vary.

European vs. US Sizing

European sizing uses a continuous numeric scale based on centimeter measurements. Women's EU sizes typically run 30–32 higher than US equivalents (US 8 ≈ EU 38). Men's EU sizes reflect chest circumference in centimeters — EU 50 corresponds roughly to a US L with a 40" chest. Different European countries maintain variants: Italian sizes add a further offset, and French sizes can differ slightly. Always confirm against the specific brand's published chart when purchasing from EU retailers.

Asian and International Sizing

Japanese clothing traditionally uses small numerical equivalents (5, 7, 9, 11, 13) for women, running substantially smaller than US sizing. An XL from a Japanese brand may be a US or EU medium. Korean sizing tends to be similar. Australian sizing is close to UK sizing but uses the same numbers as US sizing — AU 12 = US 8 = UK 12. When buying from any Asian brand without a clear Western calibration note, size up 1–2 sizes as a starting point, then reference their specific size chart measurements.

Fit Preference and Sister Sizes

Beyond matching a size range, how a garment fits depends on the fabric and intended silhouette. For fitted cuts and stretch fabrics, choosing the smaller of two adjacent sizes produces a cleaner silhouette. For relaxed fits, stiff wovens, or layered outerwear, go larger. Sister sizes — adjacent sizes with the same body volume — are useful when your measurements straddle two size bands. If your bust measures S and your waist measures M, the sister sizes card in this calculator shows both options so you can decide based on which measurement matters most for that garment type.