For the first summer in 10 years I'm not in a surgical contraption of some sort for walking. OK, I can't manage much more than tevas (tried birkenstocks, but just couldn't make them work), but I am still ridiculously happy. But having put the them on, my feet feel stupidly vulnerable and exposed, especially my toes. This is my normal size, do I need to size up? Where are your toes meant to sit in sandals?