My family lives in keens in the summer, although my kids find them cumbersome unless they are creeping or hiking. They prefer flipflops for slipping on and going outside the house.
My son wears a mens 8 in most shoes and I was dreading having to purchase mens keens for him since the price jump is considerable. I ordered a pair of these in kids 7 and they fit! My other son also wears a size down in keen sandals.
I ended up returning these because he prefers the Newport H2. He says they are sturdier and protect his feet better with the heavier sole.