Hey, thanks for your reply!
I just tested the Libertine boots yesterday en they felt so nice that i've bought them!
They are 44,5 (EUR), so i think it's an 11.
Boards i was checking out where: Burton 2012 Hero and the Burton 2013 Sherlock.
I think with an 11 my boots are just too large for the Burton Medium bindings, is that right? Are the most boards (lets say from 155) wide enough for my feet with a large binding then?