Does China Use MM to Measure Shoe Size?
Yes, China uses millimeters (mm) as the standard unit for shoe size, but it’s a totally different system compared to US/EU/UK. In fact, the Chinese shoe size (often labeled as ‘CN’ or ‘cm’) is directly based on foot length in centimeters (10 mm = 1 cm). For example, a size 40 EU corresponds to a foot length of about 250 mm (25 cm).
When sourcing from Chinese wholesale markets like Soudangkou, you’ll see sizes like ’39’, ’40’, ’41’ – but these are in mm converted to a simple numeric code. Here’s the deal: China uses a consistent mm-based scale, but you need to know the exact foot length (in mm) to match it. For instance, size 40 = 250 mm, size 41 = 255 mm, size 42 = 260 mm, and so on.
How Chinese Shoe Sizing Works
Chinese shoe sizing is basically a direct translation of foot length in millimeters minus a constant. The formula is: Chinese size = (foot length in mm – 5) / 10 + 1. But don’t get tangled in math – the point is that the number you see (like 39) corresponds to a specific foot length in mm.
At the wholesale level, particularly in Canton, Fujian, and Wenzhou (major shoe hubs), manufacturers use mm-based lasts. So if you order a men’s shoe in size 43, expect the last to be 265 mm. This is golden for precision – no more guesswork like ‘does a US 9 fit me?’
Why This Matters for Wholesale Sourcing
If you’re buying from a wholesale market stall, you must ask: ‘What is the foot length in mm for this size?’ Many stalls in Soudangkou carry one-size-fits-all Asian sizes, but quality suppliers offer sizes S (225 mm), M (235 mm), L (245 mm), XL (255 mm).
Tip: Always request a size chart with mm measurements. Chinese manufacturers are meticulous about foot length, but sizing can vary ±5 mm across factories. For the best fit, order a sample in your desired mm size before bulk buying.
Pros & Cons of Chinese Shoe Sizing
Pros: Accurate foot length mapping; easy to convert between brands; consistent scale for men, women, and kids (just different length ranges).
Cons: Confusion with European sizes (which also use mm-based but with different calculations); many sellers still use cm on labels, but the system is identical.
FAQ: Decoding Chinese Shoe Sizes
| Question | Answer |
|---|---|
| What is Chinese shoe size 42 in mm? | Chinese size 42 = 260 mm foot length (common for men). |
| How to convert Chinese shoe size to US? | US men’s size = (Chinese size – 18) roughly. But trust mm: size 42 (260 mm) ≈ US 8.5. |
| Do Chinese women’s shoes use the same mm scale? | Yes, but typical lengths are 220 mm (size 34) to 250 mm (size 40). |
| Is Chinese sizing same as Japanese? | No – Japan uses a 1 cm step (e.g., 25 cm = 25.0), while China uses 0.5 cm steps but same mm basis. |
| Can I trust mm sizing on cheap shoes? | Generally yes, but check the insole length. Quality stalls at Soudangkou provide accurate mm specs. |
| What’s the difference between cm and mm? | 10 mm = 1 cm. Chinese sizing uses both, but mm is more precise for manufacturing. |
Final Advice for Sourcing
When you’re at a wholesale market, don’t just look at the size number. Grab a ruler, measure the insole in mm, and compare to your target foot length. Chinese stalls are open to this – they know mm is the real deal. If you’re sourcing from Soudangkou, ask for the ‘mm size chart’ – it’s standard. And always order samples to feel the fabric quality and stitching.
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