These shoes do run small!  Everyone's foot is different, so these may run 1/2 to a full size smaller than your normal size.  I wear a (women's) size 11 and I have a high arch.  I read the reviews and checked them in Fake Spot for authenticity and ended up ordering an 11.5 and ****They Fit Perfect!!!****  I work 12 hour shifts and am on my feet constantly. I am very happy with these shoes.  I was referred by a podiatrist to a "Running Fit" store about 12 years ago and they measured my foot, my stride/gait, etc.  I was fitted with a Brooks Adrenaline GTS shoe.  I wear these and Saucony ST Walker pretty much exclusively for my work as an RN.  I am very happy with these Brooks Adrenaline GTS 17.  ORDER 1/2 to full size up.  Maybe try on in a store (Foot Locker, Running Fit, etc..) and then order online.  ***THESE ARE FOR OVER PRONATION!!****  Hope this helps!