Hi everyone, I just bought a pair of this YSL runway 2012 moccasin pumps and was wondering if any of you know how the sizing runs for this particular style. I know it's small to size but I'm not sure by how much (half a size? a whole size?) http://shop.nordstrom.com/s/yves-saint-laurent-shield-loafer-pump/3267248 I am debating between two sizes, 36.5 and a 37 (I am usually a US 6 - 6.5, but 6 is more like my true true size). Any suggestion would help! Thanks in advance!!!