My shoe size is 11 narrow. If you have a slim foot and have difficulty finding footwear that does not want to slip off your foot as you walk, then this is the boot for you. It fits my foot like a glove without irritation. However, where the top of the boot meets the lower leg requires a walking break-in period; it's a bit stiff and may rub. I noticed this only on the left boot but not the right. Well-made and definitely waterproof. This would make a good all weather motorcycle riding boot, also providing protection to the ankles. I would definitely purchase again but be aware of the break-in period. At first I could only use for 1/2 hour walks until such time that where the top of the boot meets the left leg broke in and became more flexible. When new, you can facilitate the break-in period by walking in the boots without pulling the zipper close. Eventually the top of the boot where it meets the leg becomes more flexible.