I am usually a 9.5, so I thought the size 10 would be fine, and it is still small.  The part that goes between the toes is OK, but perhaps due to the sizing is uncomfortable.

They are well constructed and they are just flip flops.

I have seen great reviews for Keen, so I might try again with a shoe.
Thanks everyone for the reviews.  This is just my experience, I honor those who love the shoe and the brand