I'd go down at least a1/2 size. All of mine are 1/2 to a full size down.I too have gone back and forth on a pair & have finally decided to pull the trigger. I actually HATE buying shoes without trying them on first but in this case there is no choice. I normally wear between an 8 1/2 to 9 depending on the style and the designer. Just bought some Prada's in 8 1/2. I hope to get it right the first time. Returns are a hassle. Love yours! Hope you are enjoying them!