Simply BLISS for the foot! The original member of the stretch canvas and no drawstring families, the SD16 will hug the foot in all the right places and offer the perfect amount of protection.
A = narrow; B = medium; C = wide; D = extra wide
If you prefer a snug fit - Approximately 2 sizes down from street shoe size
If you prefer a looser fit - Same as street shoe size OR 1 size up from street shoe size