I bought these to replace my NB769's & I am happy with them. I ordered my usual 8B size, and they feel a tiny bit bigger than my old shoes for some reason. I don't know if they actually are a bit bigger or if my old ones had just molded to my feet? In any event, the new ones are not too big to run in & I have had no injuries, blisters, or problems. Recommend wearing new balance dry fit socks with them!