Uniqlo Clothing Size Guide & Conversion
Shopping Uniqlo from another country? This page converts Uniqlo clothing sizes to your region and explains how Uniqlo's sizing tends to run. Often runs slightly small in the shoulders and length; some size up for comfort.
Converted Sizes
Brand sizing philosophy
Uniqlo uses Japanese sizing with US, EU, and UK equivalents. Focus on consistent basics and technical wear.
Known inconsistencies
JP cm-based sizing is consistent; letter sizes (S/M/L) can differ from Western brands.
Fit tendencies
Often runs slightly small in the shoulders and length; some size up for comfort.
Fit and sizing explained
Fit Problems Explained
Most fit issues come down to measurement, not the size itself. Taking accurate body measurements and comparing them against the chart removes most of the guesswork.
How to Measure Your Feet in CM · Common Shoe Sizing Mistakes
Why Sizes Vary
Clothing sizing systems were built independently by region, so a size label alone can’t be compared directly across countries. Anchoring to a physical measurement is the reliable way to translate between them.
Brand Differences
Brands use different lasts and fit models. Nike often runs small; Adidas and Puma can differ by style. Always check the brand's size chart before ordering.
Regional Differences
Regional shoe sizing systems evolved independently, so the same foot length gets a different number in the US, UK, EU, and Japan. Comparing foot length in centimeters is the most reliable way to check a size across regions.
Why EU and US Shoe Sizes Differ · How Japanese Shoe Sizes Work · How UK Shoe Sizes Differ From US and EU
User fit warnings
Always check the brand's official size chart for the specific product. Sizing can change by season and style. When between sizes, consider sizing up for comfort or ordering two sizes and returning one. Read recent customer reviews for fit notes.
Explore more size guides
Shoe Size Converter
Convert any shoe size across US, UK, EU, Japan, China, and CM.
Clothing Size Converter
Convert tops, pants, and dress sizes across regions.
Measurement Assistant
Step-by-step help measuring your foot or body accurately.
How to Measure Your Feet in CM
The most reliable way to cross-check any size chart.
Zara size guide
See sizing and conversion details for Zara.
H&M Size Guide
See sizing and conversion details for H&M.
Shein Size Guide
See sizing and conversion details for Shein.
Frequently Asked Questions
How do I use this converter?
Select your gender, category, region, and size above. The converted sizes for other regions appear automatically — no separate submit step needed.
Does Uniqlo run true to size?
Often runs slightly small in the shoulders and length; some size up for comfort.
How does Uniqlo sizing compare to standard charts?
Uniqlo uses Japanese sizing with US, EU, and UK equivalents. Focus on consistent basics and technical wear.
Does Uniqlo sizing vary by product line?
JP cm-based sizing is consistent; letter sizes (S/M/L) can differ from Western brands.
Should I check Uniqlo's official size chart too?
Yes. This converter gives a standardized international equivalent, but individual clothing items can run differently by style or season — checking Uniqlo's own size chart for the specific product reduces the chance of a return.