I am a true 11.5 with a narrow foot.  I purchased my first pr. of Saucony at a Neovita Shoe store when I was having my initial severe plantar fasciitis problem.  I have purchased a new pair of these  every 10-12 months since.  The Powergrid and Triumph are my favorites by far.....I take the original sole out and put in my generic Neovita super arch support and a  new sponge type insole and they are perfect.  If I did not put the extra accessories in the 11.5 may run a little on the long side and I could probably fit into an 11 perfect.....This is the perfect tenny shoe for my foot problems......