SHOE LABELS · ADULT REFERENCE

Chinese Shoe Size to US Converter

Read a Chinese shoe label or measured foot length, then compare US men’s and women’s sizes using a named reference chart.

Reference checked 2026-10-15 · No signup · Calculations stay in your browser

Reference: adidas adult footwear. For other brands use their own chart. Confirm whether a seller’s CN label uses millimetres or EU-style numbering.

CN 250, CN 40 and centimetres mean different things

A seller-confirmed 250 mm foot-length label is 25 cm. CN 40 may instead be an EU-style retail label. Selecting EU-style uses the exact label in the adidas table; a missing row is reported rather than interpolated into an invented size.

Adult shoe size comparison chart

Read across one row within this adidas chart. These are brand reference values; they do not establish a universal Chinese-to-US formula. “Not listed” means this reference has no women’s value for that row. Scroll the table on smaller screens.

adidas adult footwear reference
EU-style label	US men	US women	UK	Foot length (cm)
36	4	5	3.5	22.1
36 2/3	4.5	5.5	4	22.5
37 1/3	5	6	4.5	22.9
38	5.5	6.5	5	23.3
38 2/3	6	7	5.5	23.8
39 1/3	6.5	7.5	6	24.2
40	7	8	6.5	24.6
40 2/3	7.5	8.5	7	25
41 1/3	8	9	7.5	25.5
42	8.5	9.5	8	25.9
42 2/3	9	10	8.5	26.3
43 1/3	9.5	10.5	9	26.7
44	10	11	9.5	27.1
44 2/3	10.5	11.5	10	27.6
45 1/3	11	12	10.5	28
46	11.5	12.5	11	28.4
46 2/3	12	13	11.5	28.8
47 1/3	12.5	13.5	12	29.3
48	13	14	12.5	29.7
48 2/3	13.5	14.5	13	30.1
49 1/3	14	15	13.5	30.5
50	14.5	15.5	14	31
50 2/3	15	Not listed	14.5	31.4
51 1/3	16	Not listed	15	31.8
52 2/3	17	Not listed	16	32.6
53 1/3	18	Not listed	17	33.5
54 2/3	19	Not listed	18	34.3
55 2/3	20	Not listed	19	35.2

Measure the foot, not the shoe

Stand with your weight on a flat surface and mark the heel and longest toe.
Measure that distance on both feet; compare the longer foot with the brand’s instructions.
Select centimetres, millimetres or inches above. If the length falls between chart rows, the tool shows both neighbours.

Inside length includes space inside a shoe. Selecting inside length converts cm to inches but does not infer a US size. Printed CM/JP labels can also differ from actual foot length: Nike explicitly distinguishes its CM label and foot-length measurements.

Why do other converters give a different answer?

Retail labels vary by brand and men’s/women’s chart. Width, toe shape, socks and the specific shoe model also affect fit. This tool reports exact matches and neighbouring reference rows without promising the shoe will fit. It does not extrapolate outside the supported adult chart or convert children’s sizes with adult formulas.

Reference and checking

The values above come from the adidas men’s and women’s footwear chart, checked 2026-10-15. Use the actual product’s chart if it differs. If the label is ambiguous, ask the seller for the foot-length column and whether their CN label means millimetres or an EU-style size.

Continue with another tool

Examples and related conversions

Open a specific example, then edit its inputs to calculate your own result.

Reference answer

In the adidas adult chart, EU 40 is US men 7 / women 8 with a 24.6 cm foot-length reference. The separate 25.0 cm row is EU 40 2/3, US men 7.5 / women 8.5.

Scope: Named adidas chart only. CN marketplace labels need confirmation as millimetres or EU-style numbering.

Source: adidas adult footwear chart · Method and verification limits