Fortunately, the 6W fits snug-to-perfect, especially around my high instep. Footbed length is true to size 6. Super-lightweight and energizing. My first crocs shoe and I was afraid plastic straps would bind, rub or irritate. Have worn these 10 hours and they aren't hurting my feet at all. Pretty, too, in khaki with white trim... goes with so many things! Will clean scuffs, etc. with same solution I use on my vinyl patio furniture.