Brand sizing varies
Shoe sizing is not perfectly standardized across brands, countries or shoe types. Running shoes, formal shoes and boots can fit differently even with the same labeled size.
Example
If your longer foot measures 27 cm, the calculator estimates common EU, US and UK size equivalents. Treat the result as a starting point before checking the brand's chart.
Common mistakes
Measure both feet and use the larger measurement when fit matters. Also measure later in the day if your feet tend to swell.
Limitations
Width, arch shape, sock thickness, shoe style and brand last shape can matter as much as length. Check the brand's own size chart before buying.
Last reviewed: 2026-05-17