There's been 2 different responses to the sizing of Tom's shoes.
I generally wear a 10 but as always it can vary by designer.
I've seen a bargain pair of brogues but they are a size 11 so I'm just debating if I could get away with them.
Its not just varied by designer, even within the Tom Ford range i wear sizes ranging from 8.5 to 10.5. It depends on the model of shoe you are looking at. The best thing you can do is try and find a store that stocks them and try them on there before buying online, and this is not just because of different markings due to EU vs US sizing, i bought a pair of oxfords from the NYC store and i fit into a 9.5, from the same store i have a pair of loafers that i needed a 10.5 in, another pair of loafers from the same store same sales person etc i was a 10 although this loafer was a different design from the last one, and yet another pair of loafers this one a different design again but was going for a really good sale price at the woodbury outlet, they only had 10.5 and it fit me like clown shoes