Print a foot ruler
⚠️ Print at 100% / actual size — turn off "Fit to page" in your print dialog, or the measurements will be wrong.
Check the print scale first
A bank card should cover the box exactly, and the bar should measure 10 cm with any ruler. If not, print again at 100% with "Fit to page" turned off.
Cut out both strips and tape strip 2 onto strip 1 so the two 15 cm marks line up. Put the ruler on the floor against a wall, stand with your heel against the wall, and read where your longest toe ends.
Then enter the length in cm into the shoe size converter. →