Clothing Size Converter: International Clothes and Shoes
Clothing Size Converter PRO
Convert clothing, jeans, shoes, bras, children’s sizes, hats and gloves across 13 countries or estimate a size from body measurements.
Body measurements and international size labels are not standardised between brands. Treat every result as a starting point and check the retailer’s chart before ordering.
Results
A clothing size converter helps compare labels used in the United Kingdom, France, Germany, Sweden, Ukraine, South Korea, Japan, Norway, Italy, Brazil, Spain, Denmark and Türkiye. It can also recommend an approximate size from body measurements for women’s clothing, men’s clothing, jeans, shoes, bras, children’s clothing, hats and gloves.
International conversion is never exact. A label such as EU 40, UK 12 or M is only a shorthand for a range of body measurements. Brand pattern blocks, intended fit, fabric stretch, garment ease and product category can all change the result. The safest approach is to use a converter for orientation and then confirm the exact brand chart before ordering.
Why clothing sizes differ between countries
Clothing systems developed independently. Some markets use numbers, some use letters, and some children’s ranges use height or age. The same label can represent different body dimensions in different product lines.
Modern standards try to improve clarity by basing size designation on body measurements. ISO 8559-1 defines anthropometric measurements used for clothing, while ISO 8559-2 identifies primary and secondary dimensions for garment types. European EN 13402 documents also describe body-measurement-based size labelling. These systems improve communication, but they do not force every brand to use identical garment dimensions.
What the converter includes
- women’s clothing based on bust, waist, hips and height;
- men’s clothing based on chest, waist, neck, sleeve and height;
- jeans and trousers using waist and inseam measurements;
- adult and children’s footwear based on foot length and width;
- bra size estimation from underbust and full-bust measurements;
- children’s clothing based mainly on height;
- hat sizes from head circumference;
- glove sizes from hand circumference and hand length;
- known-size conversion across 13 countries;
- centimetre and inch input plus CSV export.
Centimetres and inches
The calculator accepts metric and imperial units:
inches = centimetres ÷ 2.54
centimetres = inches × 2.54
Keep at least one decimal place until the final comparison. Rounding a waist of 74.8 cm to 75 cm is usually harmless, but rounding several borderline measurements too early can shift a recommendation.
How to take reliable body measurements
Use a flexible tape over light clothing. Keep it level and close without compression. Stand naturally without changing posture.
Repeat each measurement twice. Help from another person improves sleeve and inseam measurements. For a fitted non-stretch item, use the larger of two close readings.
Women’s clothing conversion
Women’s tops, dresses and jackets commonly use bust as the primary measurement, while trousers and skirts depend more on waist and hips. The converter compares all entered values and selects a size that accommodates the largest relevant measurement.
This is important because body proportions are not identical. One measurement may match one size and another may match the next. The confidence indicator warns when the measurements span several size bands.
Fit preference
The close, regular and relaxed settings adjust the recommendation, but they do not change the body measurement. Close fit is suitable only when the fabric and product design allow it. Relaxed fit may add room, yet an intentionally oversized garment may already include generous ease in the manufacturer’s pattern.
Men’s clothing conversion
For jackets and shirts, chest and neck are often important. Trousers rely more on waist and inseam. Sleeve length and height help identify whether a regular, short or long proportion may be more suitable.
A suit size is not automatically the same as a casual T-shirt size. Tailored and casual clothing use different labelling, so select the correct category.
Jeans and trouser sizes
Jeans commonly use the format W/L:
W = waist measurement in inches
L = inside-leg measurement in inches
A result such as W30/L32 means an approximately 30-inch waist and 32-inch inseam. It does not describe hip shape, rise, thigh width or fabric stretch. Two jeans with the same W/L label can fit differently because of cut and material.
Measure the body for a recommendation. When replacing a well-fitting pair, measuring the garment can also help, but garment waist width laid flat must normally be doubled and should not be confused with body circumference.
Shoe size conversion
Shoe conversion should begin with foot length, not the printed size on an old pair. ISO 9407 defines the Mondopoint system using foot dimensions, and ISO 19407 provides conversion guidance among major systems, including Mondopoint, European, UK, US, Japan and Korea.
The converter estimates EU, UK, US, Brazilian, Japanese, Korean and Mondopoint values. These remain approximate because shoe systems have developed differently and manufacturers use different lasts.
How to measure feet
Measure both feet while standing, preferably later in the day when feet may be slightly larger. Place the heel against a vertical surface and measure to the longest toe. Use the longer foot. Wear the socks normally used with the footwear.
Foot width matters as well as length. A wide foot may require a wide-fit model rather than a longer shoe. Increasing length to solve a width problem can create heel movement.
Bra size conversion
A bra size combines a band and a cup. The converter uses underbust for the band and the difference between full bust and underbust for the cup:
cup difference = full bust circumference − underbust circumference
The difference is mapped to cup steps, while the band is rounded according to the selected regional system. This is an estimate because UK, EU, French, Italian, US, Japanese and Korean labels do not progress identically.
Cup letters are not absolute volumes. A D cup on a smaller band is not the same volume as a D cup on a larger band. This is why sister sizes are useful.
Sister sizes
A sister size changes the band and cup in opposite directions to preserve a similar cup volume. For example, moving one band size down usually means moving one cup step up. Sister sizes are a fitting option, not guaranteed equivalents, because wire shape, cup depth and strap placement vary.
Children’s clothing sizes
Height is usually more reliable than age because children of the same age can have different proportions. The converter therefore uses height as the main input and treats age as an approximate reference.
Chest and waist measurements can refine the result. For outerwear, school uniforms and non-stretch garments, compare these measurements with the brand chart. Growth allowance should be moderate; excessively large clothing can affect comfort and movement.
Hat size conversion
Measure around the head where the hat is intended to sit, usually above the eyebrows and ears. The circumference in centimetres is often the most direct hat size. The calculator also estimates international letter sizes and UK fractional sizes.
Hair volume, lining thickness and hat style can change fit. Helmets and protective headwear must follow the manufacturer’s safety fitting instructions rather than a fashion-hat conversion.
Glove size conversion
Glove sizes are usually based on hand circumference measured around the knuckles without the thumb. Hand length can be used as a secondary check. The calculator returns an international label and numeric size.
For work, cycling, skiing or protective gloves, finger length, insulation and certification matter. A fashion-size estimate does not replace product-specific safety guidance.
Why brand charts still matter
ISO 8559-3 explains that body measurement tables are developed for target populations and need flexibility because body shapes and proportions vary. A manufacturer then adds design ease and creates garment dimensions. Therefore, a universal converter cannot know the exact pattern of every product.
Check the retailer’s chart in this order:
- confirm whether it lists body or garment measurements;
- select the correct product and gender category;
- compare the most important body measurement first;
- check secondary measurements and length;
- read fit notes and customer information;
- review exchange and return conditions before ordering.
Understanding the confidence result
A high confidence result means the main measurements point to the same or adjacent size. Lower confidence means they are spread across several bands. It does not judge the body; it only indicates that a single standard size may not describe all entered measurements equally well.
In a mixed result, choose according to garment type. For trousers, hips and waist normally matter most. For a fitted shirt, chest, neck and shoulder-related dimensions matter more. Alterations may provide a better result than selecting a much larger overall size.
Known-size conversion
When only a label is known, the converter maps it through an internal reference table and displays estimated equivalents for all 13 countries. This is faster than entering measurements but less reliable because the original brand’s measurement range is unknown.
Use known-size conversion for filtering and body measurements for fitted or difficult-to-return items.
Common mistakes
- measuring over bulky clothing;
- pulling the tape too tightly;
- confusing body and garment measurements;
- using age alone for children’s clothing;
- measuring only one foot;
- assuming the same cup letter has the same volume on every band;
- using a women’s shoe conversion for men’s footwear;
- ignoring fabric stretch, rise, cut or layering;
- treating country equivalents as exact brand matches.
Frequently asked questions
Are EU and German clothing sizes the same?
They are often similar for standard adult clothing, but brand charts and product categories can differ.
Should I choose size from my largest measurement?
For fitted, non-stretch garments, the largest relevant measurement is usually the safer starting point.
Is shoe size based only on foot length?
Length is the main conversion reference, but width, last shape and intended use also affect fit.
Can bra sizes be converted exactly?
No. Band and cup progressions differ by system and brand, so the result is approximate.
Should children’s size be selected by age or height?
Height is generally the better starting measurement; age is only a guide.
Why does the brand chart disagree with the converter?
The brand may use different body intervals, garment ease, fit models or regional labelling.
Official standards and references
- ISO 8559-1: anthropometric definitions for body measurement
- ISO 8559-2: primary and secondary dimension indicators
- ISO 8559-3: methodology for body measurement tables and intervals
- BSI: BS EN 13402 size designation of clothes series
- ISO 9407: Mondopoint footwear sizing
- ISO 19407: footwear sizing-system conversion
- ISO 8559-5: head and face measurements
Sources reviewed: 20 June 2026.
