Japanese Shoe Size to US Conversion

Converting Japanese shoe sizes to US sizes can be confusing, as the sizing systems are different. Here is a comprehensive guide on how to convert Japanese shoe sizes to US men's and women's sizes.

How Japanese Shoe Sizes Work

The Japanese use a different method of shoe sizing than most other countries. Here are some key things to know:

• Japanese sizes are measured in centimeters, not inches.

• Size increments differ - men's go up by 5 mm and women's by 2 cm.

• The sizes do not always correlate numerically to US sizing.

• There are different sizing charts for men's and women's shoes.

• Half sizes are not used.

Men's Japanese Shoe Sizes

For men's shoe sizes, the centimeters refer to foot length. The sizes increase in 5 mm increments.

• 20 cm = US 6
• 25 cm = US 8
• 26 cm = US 8.5
• 27 cm = US 9
• 28 cm = US 10

And so on, with each 5 mm adding approximately a US half size.

Women's Japanese Shoe Sizes

Women's Japanese shoe sizes go up in 2 cm increments. The sizing is based on foot length, but does not directly convert to US numerical sizes.

• 21 cm = US 5.5
• 22 cm = US 6
• 23 cm = US 6.5
• 24 cm = US 7.5
• 25 cm = US 8

As you can see, the Japanese women's sizes do not match the US sizes consistently.

Converting Japanese Men's Shoe Sizes

To convert a Japanese men's shoe size to US, follow these steps:

1. Take the length in cm.

2. Divide by 5 to get an approximate US size.

3. Round to the nearest half size.

For example, a 27.0 cm Japanese size converts to:

• 27 cm divided by 5 = 5.4
• Round 5.4 to 9 (27 cm = US Size 9)

Here is a chart for common Japanese men's shoe sizes converted to US:

Converting Japanese Women's Shoe Sizes

Converting women's Japanese shoe sizes takes an extra step, as the sizing does not perfectly match up.

Here is the process:

1. Take the length in cm.

2. Subtract 1 cm.

3. Divide by 2.

4. Round to the nearest half size.

For example, a 24 cm size converts to:

• 24 cm - 1 cm = 23 cm
• 23 cm divided by 2 = 11.5
• Round 11.5 to 7.5 (24 cm = US Size 7.5)

Common women's conversions:

Tips for Converting Japanese Shoe Sizes

• Refer to the specific sizing charts for men's versus women's shoes.

• Women's sizes require the extra step of subtracting 1 cm first.

• Round to the nearest half size for best fit.

• If in between sizes, consider sizing up for wider feet or sizing down for narrow feet.

• Try on shoes when possible to ensure best fit. Sizing charts are guides but fit can vary across brands.

• For kids' sizes, utilize children's sizing conversions instead.

By understanding the Japanese shoe sizing system and proper conversion methods, you can confidently determine your US size for shoes made in Japan. With the right size, you can enjoy comfort and style.