So I've been buying Keen for a couple years now, and consistently I'm a 11.5 regular width through about 6 pairs. ( I bought a size 12 in the insulated winter boot to wear thicker / multiple socks ). These run slightly small so my toes slightly touch the end, and unfortunately since the material on these shoes is very soft ( comfy! ) the support and restraint of the foot from sliding around, isn't enough and when walking down hills or on tricky terrain my toes end up shoved in the end of the shoe. By the end of my shift, my feet hurt. I've tried tying tighter, but in reality this safety shoe is truly a sneaker, that offers minimal support and meets the safety toe requirements. I would not recommend these to anyone working in ANY imperfect environment or even doing any real work. Inside warehouse only, ( I'm in industrial manufacturing, which is a little varying terrain ). Also, try a half size up from your normal keen boot. Love keen, love how light this boot is, but the lightness shows in its construction and strength. Wore them for 3 shifts and can't wear them again. Try to find somewhere to try them on before purchase, they're probably situationally great. Not for my situation.