Purchased these for my husband who wears an 11 and they are a bit snug, but not enough so to go up a size. These are definitely narrow for men's shoes, but my husband said due to the weight and thickness of the boot he's happy they are narrow so they don't slide around on his feet while walking. These are HEAVY rain boots, some of the most heavy boots I've personally encountered, but I think the thickness of the rubber/PVC or whatever they are made of will make them hold up for awhile. We are keeping them because since they don't have half sizes, going up to a size 12 would be too big. They are very stylish and a great boot for men who don't want wet feet!