Thanks to the internet you can buy products from virtually anywhere in the world. Unfortunately, converting shoe sizes from one country to another can be difficult. Below is a good guide but please remember that how a boot actually fits can vary based on the last.
Thank to our friends at multicam-inside.fr for the image.
And, for boots, ALWAYS take a size higher than yours.
Converting to Euro sizing or just in general?
In general. A size higher will better accomodate a second pair of socks during cold season and/or trekking.
Plus, this will give you more comfort when trekking (expecially downhill, and if the neck of the boot it’s well tied), because there’s more space between fingers and boot.
😉