How do I convert US shoe sizes to EU sizes?

US men's to EU: add 33. US 9 = EU 42. US 10 = EU 43. US 11 = EU 44. US women's to EU: add 31. US women's 8 = EU 39. US women's 9 = EU 40. US women's 10 = EU 41. Note: EU sizes are unisex and represent foot length in Paris points (2/3 cm). Always measure your foot in cm for the most accurate conversion.

What is the difference between US and UK shoe sizes?

UK men's sizes are typically 0.5–1 size smaller than US men's. US 10 = UK 9 (or 9.5 depending on brand). UK women's sizes are 1.5–2 sizes smaller than US women's. US women's 8 = UK 6 (approximately). Sizing varies by brand and manufacturer — always check the brand's specific size chart. US and UK children's sizes are aligned.

How do I measure my foot for the correct shoe size?

Measure in the afternoon (feet swell during the day). Stand on paper and trace both feet. Measure the longest dimension (heel to longest toe). Foot length to US men's size: ~24.6 cm = US 7, ~25.4 cm = US 8, ~26.2 cm = US 9, ~27 cm = US 10, ~27.8 cm = US 11, ~28.6 cm = US 12. Add 1–1.5 cm to your actual foot length for shoe sizing (toe box space). Always size for the larger foot.

Shoe Size Converter

Gender

Size system

Size

Shoe Size Converter — International Size Charts

Convert shoe sizes between US, UK, EU (European), and foot length in centimetres for men, women, and children.

Men's shoe size chart

US	UK	EU	CM
6	5.5	39	24.0
7	6.5	40	25.0
8	7.5	41	26.0
9	8.5	42	27.0
10	9.5	43	27.5
11	10.5	44	28.5
12	11.5	46	29.5

Women's shoe size chart

US	UK	EU	CM
5	3	35	22.0
6	4	36	23.0
7	5	37	24.0
8	6	38	25.0
9	7	39	25.5
10	8	40	26.5
11	9	42	27.5

How to measure your foot

Place your foot on a piece of paper on a hard floor
Trace around your foot while holding the pen vertically
Measure the distance from heel to the longest toe
Add 0.5–1 cm for comfort

Children's shoe sizing

Children's shoe systems differ significantly from adult sizing. EU sizes for children start around 16 (newborn) and transition to adult sizing around EU 35–36. Toddler US sizes (1T–13T) differ from little kid sizes (1–3) and big kid sizes (3.5–7).

Conversion formula

EU to US (men): US = EU − 33
EU to US (women): US = EU − 31
EU to UK: UK = EU − 33.5
EU to CM: CM = EU × 0.667

References

ISO 9407:2019 — "Footwear — Sizing — Mondopoint system of sizing and marking." International Organization for Standardization.
Rossi WA (2001). "Footwear: The primary cause of foot disorders." Podiatry Management.

How Shoe Sizing Systems Work

Shoe sizing has three major systems. The EU system measures foot length in Paris points (1 Paris point = 2/3 cm), so EU size 42 corresponds to 42 × 2/3 = 28 cm. US men's size 9 ≈ EU 42 ≈ UK 8. The UK scale is consistently 1.5 sizes below US men's. Japan uses centimetres directly (27 cm), making it the most intuitive system. Australia and New Zealand follow UK sizing for adults.