Tommy Hilfiger Men Pallet6 Sneaker

I would like to purchase one for my boyfriend he wears size 12 in u.k size, so i would like to know what size should i get him in the u.s size?

Are these shows waterproof or water resistant? I live is the pacific north west and wonder how well they may handle rain?

Good day. my size normal is us 10(28.5cm) . but i’ve read a lots of feedback that’s size is not match. how to choose the size in the right way?