I ordered these red Rolandos from Barneys and I think I shouldn't have sized up. They aren't the most comfortable shoes in the world but I think they are so pretty I really want to keep them. But if you look at how much room there is at the back of my foot, I really just think they are too big. I just went to Barneys website and they have a 5.5 available (my regular size) so I ordered those. I can walk in the 6 but they just have so much space at the back. I know with heels your foot slides down but I think this is too much. What do you think? I hope Barneys is good about returns because either way one is getting returned.