You will need to buy one size larger, as these shoes run a little small.  I normally wear a size 7, but I bought an 8 based on other reviews I read about this particular shoe.  I'm glad that I did.  I have a feeling the size 7 would have been too small for me.  The size 8 is just a tad big, but I can always put a small insole in it to make a perfect fit and make 'em even more comfortable!