but you might also need smaller shoes.......ha ha.....
i bought a pair of size 9 ascis as my work shoes etc etc are all size 9.....
got black toenails on the first long run.....(over 13miles) after talking about it to a load of runners they said even in large shoes you can damage your nails as the toes slide about in the "toebox" area.....
don't they often say,,,,put your thumb sideways across the top of your big toe and that should be the space you need in your trainers....
some say you might even need 1 full size larger shoes to allow for swelling when hot,,,in my case with skinny narrow feet, i needed to go down 0.5 size....
good luck with the running and shoe size.
paul.