I usually order a size 8 in heels so they are roomy..comfortable.  These pumps, although very cute, fit small.  If I hadn't already worn them to work, I would return them for a half size larger.  The make is awesome; nice cushioning, well fitting around the heel and toes.  If you intend to wear these to work and are on your feet all day, like I am...order a half size larger.