I usually wear a 10.5W without socks or an 11W with socks. I tried the 11M, but my toes were too tightly squeezed without socks. The length might have been OK but the slippers were too narrow to keep.
3rd or 4th pair I've had. Tried other brands & types, but these are the most comfortable, easiest to slide into and most supportive w/the substantial sole. No need to look elsewhere.
I have been purchasing slippers of this style for several years but this is the first time I tried LL Bean. My husband said they are the most comfortable slippers that he ever had. He said they are the BEST!