First off I'd like to point out THESE ARE NOT RUNNING SHOES!!! They're trainers meant for lateral stability while exercising, so please don't get these if you're looking for a running shoe. They aren't meant for that and hence don't have the proper support for high impact running and vertical movement as a proper running shoe would. I'll admit that they are very comfy for doing errands as well, although, again that's not what they are meant for. Shoe seems to run true to size although I've heard a lot of people say they run a 1/2 size too big. They are pretty narrow and may feel somewhat odd at first and even a bit too tight, but you get used to it and may even like the slightly snugger feeling in a shoe. Overall a good shoe for what it's meant for. I do find the heel slips a little while doing certain exercises though.