How to choose the right size?
You will get the best estimate if you look at the length of your insole (do not ever try to measure it, it will not be precise), just take a look at the size chart of any shoe brand you like and find the length in centimetres. You need to take a look at the US sizes in the size chart first and then find the length of the insole accordingly. For example, Vans shoes in a size US 7 have insoles with the length of 25 cm. Other brands may have a different US size attached to a particular length of the insole.
If you are still unsure about the sizing, we will gladly help you, email us at firstname.lastname@example.org