I have been running in Brooks for many years and am always a 7 with regular/B width.  These seem to run pretty narrow, so if you have concerns, I would def recommend going up a size or ordering the wides.  I bought these for overpronation that I struggle with, but they are not all that comfy.  With the Ghost 10s, I feel like I am running on pillows :)  I love that feeling and wish I could combine these two shoes together!

I found a way to tie the laces at the bottom to ease up on the width, it helps but I still get the occasional side blisters...