I have found keens to run true to size. My 2.5 years old has been wearing them since she was a size 4. We love them for out door play. Love the Newport style. They dry fast if you ask me! But we love in az. Everything dries fast.
For every day wear we like see Kai run sandals, salt waters (but not for lots of walking), stride rite.
But I do always make sure my kids always have a pair of keens in their size that fit. They are extremely durable even after many washes in the washer.