Narrow width/ Please see measurements below: 

Narrowest part at center of show is 2 inches
widest part across toes is 3 1/4 inches.
with at back near heel is 2 1/8 inches. 

the front straps crisscrosses over the foot and is 5 1/4inch long
The middle straps that cross over your instep are 7 inches long.