Foot length in centimeters is the most stable base measurement for shoe matching. It lets us translate sizes across EU, US, UK, RU and brand-specific systems without relying on the familiar number printed on the box.
Once the profile is saved, Unisizer takes you to the footwear brand catalog and shows which size fits that exact foot length. This works well for sneakers, boots, sandals and everyday shoes.

If you later want to compare the result with a favorite label, you can also create a second footwear profile by brand and compare the chart differences.