I was going to travel to my local Decathlon (about 15 miles away) to get a pair of boots, but then suddenly thought maybe you are not able to try on boots now.
Ok, I could try them on i the car, then no doubt bring them back if they aren't right, but that's a lot of faff, especially taking into effect the distance to the shop
Maybe just easier to order online, then buy a couple of sizes, try them on then return the ones that don't fit.