CN39 shoe size usually means a 24.5-centimeter foot length and is close to EU 39.
If you have seen CN39 on an online shoe listing, you may wonder whether it matches your usual US size. The label often refers to a Chinese sizing system based on foot length, but brand charts, shoe shape, and measuring methods can change the fit. This guide explains what is CN39 shoe size, how it compares with US and EU sizes, and how to choose the right pair with confidence.
What Is CN39 Shoe Size?
CN39 shoe size is a Chinese shoe size commonly linked to a foot length of about 24.5 centimeters, or 245 millimeters. The “CN” label means China, while “39” is the size number used by the seller or manufacturer.
In many cases, CN39 is similar to EU 39. However, it does not always equal one exact US size. A women’s CN39 often fits near US women’s 8, while a men’s CN39 may be closer to US men’s 6.5 or 7.
The most important point is that CN39 shoe size can describe the intended foot length, not the exact inside length of the shoe. A shoe may need extra room for comfort, so its insole may measure slightly longer than 24.5 centimeters.
CN39 Shoe Size in Inches and Centimeters
A CN39 shoe size is generally designed for a foot measuring around 24.5 centimeters. In inches, that equals about 9.65 inches.
Use these basic measurements as a guide:
• Foot length: About 24.5 cm
• Foot length in millimeters: About 245 mm
• Foot length in inches: About 9.65 inches
• Approximate EU size: 39
• Approximate US women’s size: 8
• Approximate US men’s size: 6.5 to 7
These values are not universal. Some Chinese shoe brands label their products with a simple number, while others use millimeter measurements such as 245. A product marked CN39 may also have a different fit if the shoe is narrow, wide, pointed, padded, or made with a thick lining.
Think of the size label as a road sign, not a complete map. It points you in the right direction, but your foot measurement and the brand’s own chart provide the final answer.
CN39 Shoe Size Conversion Chart
The chart below gives a general conversion for CN39 shoe size. It should be used as a starting point rather than a guarantee.
| Sizing system | Approximate equivalent |
|---|---|
| China | CN39 |
| Foot length | 24.5 cm |
| Millimeter size | 245 |
| EU | 39 |
| US women’s | 8 |
| US men’s | 6.5 to 7 |
| UK women’s | 6 |
| UK men’s | 6 to 6.5 |
Women’s and men’s sizing systems are not identical. A US women’s 8 and a US men’s 6.5 may have a similar length, but they can differ in width, shape, and design.
Japanese sizing is often expressed in centimeters. Therefore, a CN39 shoe size close to 24.5 cm may be similar to a Japanese 24.5 shoe. Still, check the seller’s chart because some charts list inner length instead of foot length.
Is CN39 the Same as EU 39?
CN39 is often close to EU 39, but the two labels are not always perfectly interchangeable. Many sellers use CN39 for a shoe intended for a 24.5-centimeter foot, while EU 39 can vary slightly by brand and style.
The difference may be small in casual sneakers but more noticeable in dress shoes, boots, and narrow fashion shoes. A pointed toe can feel much tighter than a round toe, even when both shoes carry the same size number.
When comparing CN39 with EU 39, review these details:
• The listed foot length
• The listed insole length
• The shoe width
• The material and lining
• Customer comments about sizing
• The store’s return policy
If you already wear EU 39 comfortably, CN39 may be a good starting point. Measure your foot before ordering to avoid relying only on the number.
Is CN39 a Women’s or Men’s Size?
CN39 shoe size can be used for women’s shoes, men’s shoes, and unisex shoes. The number itself does not identify the gender category.
A women’s CN39 shoe may have a slimmer shape and a US equivalent near women’s 8. A men’s CN39 shoe may have a wider design and a US equivalent near men’s 6.5 or 7.
This matters because length is only one part of fit. Two people can have feet that are 24.5 centimeters long but need different shoes because of foot width, arch shape, toe shape, or swelling.
For unisex shoes, focus on the actual measurements. Check whether the seller provides both foot length and width. If the shoe is made for a narrow foot, going up one size may add length without giving enough width.
How to Measure Your Foot for CN39 Shoe Size
Measuring your foot at home is the most reliable way to check whether CN39 will fit. You only need paper, a pen, a ruler, and the socks you plan to wear.
Follow these steps:
