These boots are sold in US street shoe sizes. We tried these on in the shop and found them to fit true to the stated size. The width feels like “D” or Medium.
The boots have a side zipper so they are easy to put on and take off (as compared to having to unlace and re-lace). And the laces give you adjustability for the instep and lower leg. I have fairly large ankles/calves and found the shoe strings to be one eyelet too short to go all the way to the top, so that may happen if you have thicker legs.