It's my girlfriend's 30th soon, and i was going to surprise her with a pair of Prive, but i've heard sizing is tricky! So i need some female help! She's a UK size 5, and her best fitting shoes are Aldo size 5's. But i've heard that Louboutins can run slightly small. Obvisously getting the gf to try them on first would be great, but kind of ruin the surprise! So, what size should i be going for? Was going for a 38/US7.5 in suede.