Chinese Shoe Sizes to US and EU: A Supplier Specification Guide

Chinese shoe sizes are often shown beside a factory's own size chart, while US and EU buyers may expect a familiar label. The safest way to convert a shoe size for production is to specify foot length, shoe last, width and fit rather than rely on a single number.

This guide explains how to compare Chinese, US and EU shoe sizing when sourcing footwear from China. Size labels can vary by brand, construction and market, so use the article as a specification checklist and confirm the final chart with the supplier and an approved sample.

Why a label alone is not enough

A size printed on a shoe does not tell you the internal length, toe shape, width or allowance. Two shoes with the same nominal size can fit differently because the last, upper material, insole and intended sock thickness are different.

Conversion charts are useful for starting a conversation. They are not a substitute for a measured specification. Ask the supplier which sizing system its chart uses and whether the number refers to foot length, insole length or an internal last measurement.

Use foot length as the common reference

Ask the factory to work with a heel-to-toe measurement in millimetres. A buyer should measure both feet while standing, record the longer result and state how the measurement will be used. The supplier can then explain the allowance it builds into the last and insole.

Put the measurement method in the tech pack. Note whether the measurement is barefoot or with the intended sock, where the heel is positioned and whether the result is rounded. Consistent instructions make a size set easier to review.

What to request from the supplier

• The size system shown on the product and on the carton.
• A table linking each label to foot length, insole length and any recommended fit.
• Width options or a clear statement that the style has one standard width.
• The last reference and whether the upper, lining or insole changes between sizes.
• Carton, inner-label and barcode conventions for your market.

If the supplier sends only a photo of a chart, request the editable values in writing. A chart that cannot be traced to the production specification is difficult to use when resolving a fit problem.

Build a size set before bulk production

Order representative samples across the sizes and variants you plan to sell. Check the measured internal length, width at the critical point, opening, heel fit, sole construction and the way the shoe bends. Test the product with the intended sock and normal movement for the use case.

Record comments by size instead of writing “too small” or “too large” without a measurement. A useful note describes where the issue occurs and what change is requested. Ask the factory whether a change affects every size or only one grade.

Grading and size ranges

Factories grade a base size into other sizes according to a pattern and last. The increment is not automatically identical across every product, especially when the toe shape or construction changes. Request the grading rule and review the smallest and largest sizes separately.

For children’s, safety or performance footwear, the fit and use conditions may create additional requirements. Confirm the product category, labelling and testing needs for the destination market before approving the range.

Labels, cartons and online listings

Make the label system consistent across the shoe, box, carton and sales listing. Decide which market labels appear on the product and whether a dual-size presentation is needed. The conversion shown online must match the approved chart; otherwise customers may receive a technically labelled shoe that they cannot select confidently.

Keep a record of the approved size chart and artwork version. If a supplier changes the label, carton or insole, require written approval and a new sample when the change could affect fit or customer expectations.

How to compare quotations for footwear

A shoe quote should identify the model, upper and lining materials, sole compound, size range, packaging, logo method, sample charges, MOQ and delivery term. Ask whether the price includes grading, size labels, spare components and the packaging format you need.

Do not compare a quote for a standard catalogue shoe with a quote for a modified last. Separate development, mould, sample and production costs so that the apparent unit price does not hide a different scope.

Common conversion mistakes

1. Treating a Chinese label as a guaranteed US or EU equivalent.
2. Measuring the insole of one shoe and calling it foot length.
3. Ignoring width, instep, toe shape or sock thickness.
4. Approving one base size without reviewing the grading.
5. Changing the online size chart after production without checking the physical labels.

Frequently asked questions

Is Chinese shoe size the same as EU size?

Not automatically. Some suppliers use a length-based chart and others present a conversion to a market label. Ask which measurement each number represents and approve the factory chart with a sample.

Should I use foot length or insole length?

Use foot length as the common buyer reference, then ask the supplier to document the relationship to insole length and internal fit. The two measurements are not interchangeable.

How can I reduce size-related returns?

Use a measured chart, test a representative size set, describe fit and width clearly, and keep the same approved information on the shoe, packaging and product page.

Can a sourcing agent create the size chart?

An agent can collect measurements, compare supplier charts and coordinate samples. The final fit, range and market labelling still need your approval.

Reliable shoe-size conversion starts with a measured product specification. Treat the Chinese label as a starting point, verify the last and grading, and keep the approved chart connected to the sample, artwork and production order.