Clothing Size Converter (Women's & Men's / Japan, US, UK, EU)
Convert women's and men's clothing sizes between Japan (号/size number, S/M/L), US, UK, and EU. You can also search by measured bust, chest, waist, or hip in cm. Handy for choosing the right size on overseas shopping sites.
Women's size chart
| Japan (号/size number, S/M/L) | US | UK | EU | Bust (measured) | Waist (measured) | Hip (measured) |
|---|---|---|---|---|---|---|
| XS（5号） | 2 | 6 | 32 | 77 cm | 58 cm | 86 cm |
| S（7号） | 4 | 8 | 34 | 80 cm | 61 cm | 89 cm |
| M（9号） | 6 | 10 | 36 | 83 cm | 64 cm | 92 cm |
| L（11号） | 8 | 12 | 38 | 86 cm | 67 cm | 95 cm |
| LL（13号） | 10 | 14 | 40 | 89 cm | 70 cm | 98 cm |
| 3L（15号） | 12 | 16 | 42 | 92 cm | 73 cm | 101 cm |
| 4L（17号） | 14 | 18 | 44 | 95 cm | 76 cm | 104 cm |
Men's size chart
| Japan (号/size number, S/M/L) | US | UK | EU | Chest (measured) | Waist (measured) |
|---|---|---|---|---|---|
| S | 34 | 34 | 44 | 88 cm | 74 cm |
| M | 38 | 38 | 48 | 96 cm | 82 cm |
| L | 42 | 42 | 52 | 104 cm | 90 cm |
| LL | 46 | 46 | 56 | 112 cm | 98 cm |
| 3L | 50 | 50 | 60 | 120 cm | 106 cm |
| 4L | 54 | 54 | 64 | 128 cm | 114 cm |
The chart above is a general guideline. Actual fit can vary by brand and cut (silhouette). We recommend also checking the size chart on the product page whenever possible.
Tips
- When shopping on an overseas brand's website, checking the measured bust/waist/hip values in cm (if listed) alongside the US/UK size number reduces the chance of a poor fit.
- Japanese women's sizes (号) increase in steps of 5, with bust increasing by roughly 3 cm for every 2-step increase in size number. If you know the 号 number of clothes that already fit you, you can estimate your size without measuring.
- Men's letter sizes (S/M/L/LL/3L) are based on measured chest and waist in cm. Since brands differ in cut (slim fit vs. relaxed fit), treat this as an initial guideline only.
- The same letter size (e.g. M) corresponds to completely different measurements for women and men. Double-check the gender selection when shopping for matching couple outfits or unisex items.
Frequently Asked Questions
Side Note — How did 号, S/M/L, and US/UK/EU sizes come to be?
Japan's clothing size number (号) traces back to body-type classifications defined by the JIS (Japanese Industrial Standards). Women's sizes increase in steps of 5, each with a standardized combination of bust, waist, and hip, making the system easy to reason about once you know the number. It is said to have originally been designed based on body-measurement survey data of Japanese people from the 1970s.
US and UK clothing sizes, on the other hand, have been standardized independently by different industry bodies over time, leading to a well-known phenomenon called "vanity sizing" — the same nominal size (e.g. US 8) can correspond to measurements that differ by several centimeters between brands. One factor behind this is that brands have intentionally loosened their standards to give consumers the impression they can fit into a smaller size.
EU sizes are a numeric system widely used across continental Europe, and in many countries the number is close to the actual bust or chest measurement in cm. The ISO (International Organization for Standardization) continues to discuss international standardization of clothing sizes, but the traditional size-number and letter-size conventions remain deeply entrenched among consumers in each country and are still widely used today.