This is a guide for measuring your feet at home to size for ski boots. Although it does not replace the value in seeing a qualified boot fitter it will help when making decisions about sizing.
Make sure to repeat the process for your other foot as nearly all people have different size feet.
To get an even better idea of what size ski boot you should select it’s also important to measure the volume of the foot. This is usually done with a flexible tape measure, although using a strip of paper can be sufficient. Measuring from one side of the heel over and around the ankle to the other side of the heel. The number should correlate to the length measurement of your foot. E.g. if the length of your foot is 27.5cm and your instep measurement is 28.5cm or greater you have a high volume foot and should select a size boot based off your volume measurement. If the volume measurement is 27.5cm or under, you have a standard or low volume foot and can select a boot based off your length measurement.