Louboutins run true to size normally, but sometimes run small (if very pointy toes). I find Choos normally run 1/2 size small, but then I have narrow feet. But I have basically given up buying shoes on the internet - unless you can exchange them for another size, like on NAP. Its really too hard to tell - each style changes and you never know if they fit or not. Manolos are the worst, they change sizing a lot between styles. I have one pair of 36 Manolos that fit perfectly, still I had to sell a pair of 37.5 that run so small I couldn't squeeze my toes in, no matter how hard I tried. (Handbags are easier that way...)