Just do be aware that different makes from Euro countries fit differently.
Some shoes designs are naturally narrow than others even from the same manufaturer.
I'm Size 13
I just bought high ankle short boots in 47 and they did not fit.
Length was OK, it just was way way too narrow and hurt my feet.
I talked to the local distributor and he said technically a 47 should fit as the sole size is larger than my foot length... but then the manufacturers put in all the protection, foam, linings on the inside which then make the shoe a tighter fit. He was surprised that this shoe was narrow but offered an exchange no ifs or buts.
He suggested another boot that has a wider foot in a 48 would be fine, but if you wear thick socks in winter and then you have to account for any long distance riding that you feet will swell, then a 48 might start feeling tight after an hour or so in them.
Hence I got a 49. Yes it is a teeny bit long, but no worse than a work boot.
It is very comfortable to walk around in all day and my feet do not hurt at all.
It is a pity that the selection of boots in Euro size 48 and higher is pretty terrible.
Another shoe I like is the AXO 5to9 shoe - They do come in size 13: