UK Size Conversion Tools
UK sizing uses a different baseline than US sizing and typically runs one size lower in footwear. Understanding this difference prevents common ordering mistakes.
Size Converter
Converted Sizes
UK Size Conversion Tools
UK sizing operates on a different baseline than US sizing, particularly in footwear. For men's shoes, UK sizes typically run one size lower than their US equivalent. For example, a US men's size 10 often corresponds to a UK size 9. Women's conversions vary slightly more, depending on brand interpretation and width availability.
Unlike US systems that emphasize width letters, UK footwear sizing traditionally focuses more on length, although width options are increasingly available. The structural difference between UK and EU sizing is also significant. EU sizing is based on the Paris point measurement system, calculated in increments tied to centimeter foot length, while UK sizing follows its own historical numeric progression.
Clothing sizes in the UK often use numeric formats for women (8, 10, 12, etc.) and chest or waist measurements for men. However, UK numbers do not directly correspond to US numbers. A UK women's size 12 is not equivalent to a US size 12, which frequently leads to confusion in cross-border purchases.
Our UK converters default to British sizing standards and allow conversion to US, EU, Japan, and centimeter-based measurements. This region-first structure ensures that UK shoppers can accurately interpret international size charts without manually adjusting baselines.
When ordering internationally, always confirm garment measurements in centimeters. Footwear conversions should be validated using measured foot length rather than relying solely on numeric equivalents. See our Adidas sizing guide and Reebok sizing guide for UK-relevant brand fits. Use our main shoe converter for conversions.
Quick Converters
Shoe Size Converter
Convert UK shoe sizes to US, EU, Japan, China, and CM.
Clothing Size Converter
Convert UK clothing sizes across all regions.
UK to US Size
Convert UK sizes to US for international shopping.
US to EU Size
Convert US sizes to European Union sizes.
CM to US Shoe Size
Convert foot measurements in centimeters to shoe sizes.
UK Size Conversion FAQs
Are UK shoe sizes smaller than US sizes?
Yes. UK men's shoe sizes are generally one size smaller than US men's sizes.
How do UK shoe sizes compare to EU sizes?
UK sizes use a different baseline than EU sizing, which is based on centimeter increments. Conversion requires standardized mapping tables.
Do UK clothing sizes match US numbers?
No. A UK women's size 12 does not equal a US size 12. The numbering systems differ structurally.
Is UK sizing consistent across brands?
Not entirely. While the baseline is standardized, brand-specific fit differences can affect sizing outcomes.
What is the safest way to convert UK shoe size?
Measure foot length in centimeters and compare against both UK and EU tables before converting.