Bought these as my Dearfoams are no longer available.  I read some reviews and thought I should get a good fit.  These run small.  I take a 6.5-7 ** 7 being a closed shoe or boot.  So, I thought I would be ok.. some said too small, too wide.. For me- my heel is hanging off the back.  I scrunched my foot in & they would be comfy if I can stretch them in the arch & toe area.  I have a narrow foot as well. I really never had this problem with Dearfoams. I hope this helps, but there are a couple  reviews saying - too small and too wide.  These would be great with the right fit..
 I like the look, not so shabby, and the cushion seemed ok.. I'm just hoping that they stretch the right way.  I used the stretchers hoping to get my foot into the whole slipper.. then I should have a good fit.  Order one size up- I would return/exchange but it's not worth the hassle.