What's my size? | SizeWise
Use the clothing size calculator to estimate your closest size, compare UK, US and EU sizing, and run brand size comparison checks before you shop.
- No sign-up required
- Built for mobile
- UK, US and EU sizes
- Brand size comparison
Clothing size calculator
Enter your measurements for a clothing size comparison across brands, garment types and UK, US, EU or international size labels.
Your measurements
Estimate
Loading spreadsheet size data...
The calculator is loading the workbook-derived rows for brands, garment types and UK, US and EU size systems.
SizeWise is independent and not affiliated with the listed brands unless stated otherwise. Recommendations are estimates, not guarantees.
How to measure yourself
Accurate measurements make every clothing size calculator, clothes size converter and brand comparison more useful. Use a soft measuring tape, keep it level, and measure over close-fitting clothing.
Bust or chest
Measure around the fullest part of your bust or chest while keeping the tape level and relaxed. This helps with tops, shirts, dresses and jackets.
Waist
Measure around your natural waist, usually the narrowest part of your torso. Waist is one of the most important inputs for jeans, trousers, skirts and dresses.
Hips
Measure around the fullest part of your hips and seat. Hip measurement is useful for jeans size comparison, dress sizing and trouser fit.
Inseam
Measure from the top of your inner thigh down to the ankle point where you want trousers or jeans to finish. This improves jeans and trouser size estimates.
Foot length
Stand on paper, mark your longest toe and heel, then measure the distance. Use the longer foot when comparing shoe size converter results.
Shoulders and sleeves
For jackets and shirts, shoulder width and sleeve length can explain why the same size label fits differently across brands.
Stop Guessing Your Size Online
Online sizing is confusing because every brand fits differently. A size 10 in one brand may feel like an 8 or 12 somewhere else. SizeWise helps you compare your measurements against size-chart style data so you can choose a more informed size.
Sizes vary by brand
A clothing size calculator needs brand context because a size label can mean different measurements from one retailer to another. SizeWise supports brand size comparison across popular shops.
Fits vary by garment
Jeans, dresses, tops, jackets and shoes each use different fit points, so one measurement rarely tells the whole story.
Countries use different systems
A UK US EU size converter helps make regional labels easier to compare before you choose a closest size, especially when shopping across international brands.
How the Clothing Size Calculator Will Work
Enter your measurements
Choose a garment type
Select a brand or sizing system
Get an estimated size and fit note
SizeWise is designed to estimate your closest size using measurements such as bust or chest, waist, hips, inseam and foot length. Recommendations are estimates, not guarantees, because sizing can vary by cut, fabric and product.
Popular Brand Size Calculators
Zara Size Calculator
Estimate your Zara size using measurements and fit notes.
View guideH&M Size Calculator
Estimate your H&M size using measurements and fit notes.
View guideASOS Size Calculator
Estimate your ASOS size using measurements and fit notes.
View guideUniqlo Size Calculator
Estimate your Uniqlo size using measurements and fit notes.
View guideNike Size Calculator
Estimate your Nike size using measurements and fit notes.
View guideAdidas Size Calculator
Estimate your Adidas size using measurements and fit notes.
View guideLevi's Size Calculator
Estimate your Levi's size using measurements and fit notes.
View guideMango Size Calculator
Estimate your Mango size using measurements and fit notes.
View guideGap Size Calculator
Estimate your Gap size using measurements and fit notes.
View guideShein Size Calculator
Estimate your Shein size using measurements and fit notes.
View guidePopular Size Tools
Clothing Size Calculator
Open a future measurement-based size guide for this clothing category.
View guideWhat Size Am I?
Open a future measurement-based size guide for this clothing category.
View guideWomen's Size Calculator
Open a future measurement-based size guide for this clothing category.
View guideMen's Size Calculator
Open a future measurement-based size guide for this clothing category.
View guideJeans Size Calculator
Open a future measurement-based size guide for this clothing category.
View guideDress Size Calculator
Open a future measurement-based size guide for this clothing category.
View guideShoe Size Converter
Open a future measurement-based size guide for this clothing category.
View guideUK US EU Size Converter
Open a future measurement-based size guide for this clothing category.
View guideWhy Clothing Sizes Vary So Much
Brands use different fit models, grading rules, fabrics, garment cuts and regional sizing systems. That means your size can change depending on the brand, item and fit. SizeWise is being built to make those differences easier to compare by combining measurement-based estimates with brand comparison data, garment comparison notes and garment-specific fit notes.
Built for UK, US and EU Size Conversion
SizeWise will help users compare UK, US, EU and international size labels across clothing categories including tops, dresses, jeans, trousers, shirts, jackets and shoes. It is planned to support clothing size converter workflows, a clothes size calculator, a brand size calculator index, and category tools for people searching what size am I before they shop, including a women's size calculator, men's size calculator, jeans size calculator, dress size calculator and shoe size converter.
Clothing Size Comparison Across Brands
The site also supports brand size comparison and clothing size comparison content, including Zara vs H&M size comparison, ASOS vs Zara sizing comparison, Uniqlo vs H&M size comparison, Nike vs Adidas shoe size comparison and Levi's vs Gap jeans size comparison guides.
Frequently Asked Questions
How do I know what clothing size I am?
The best starting point is to measure your bust or chest, waist, hips, inseam and foot length, then compare those measurements with the size chart or brand size calculator for the garment you want to buy.
Can I calculate my size from my measurements?
Yes. SizeWise is being built to estimate your clothing size from measurements and show nearby size alternatives where you are between sizes.
Why do I wear different sizes in different brands?
Brands use different fit models, cuts, fabrics and regional sizing systems, so the same size label can fit differently from one brand to another.
Is SizeWise an official brand size calculator?
No. SizeWise is an independent size estimation tool and is not affiliated with the brands listed unless stated otherwise.
Will the calculator guarantee a perfect fit?
No. Sizing recommendations are estimates. Always check product-level measurements where available because individual garments can vary.
Which brands will SizeWise support?
The planned brand calculators include Zara, H&M, ASOS, Uniqlo, Nike, Adidas, Levi's, Mango, Gap and Shein.
Will SizeWise support UK, US and EU sizes?
Yes. The site is designed to support UK, US, EU and international clothing size conversion.
Can I use SizeWise for clothing size comparison?
Yes. SizeWise is designed for clothing size comparison across brands, garment types and sizing systems, including UK, US, EU and international labels.
Can I compare Zara vs H&M sizing?
Yes. Use the Zara vs H&M size comparison guide, then compare your measurements in each brand calculator for a closest-size estimate.
Ready to Find Your Size?
Start with the clothing size calculator, then compare popular brand size guides as new tools are added.