These TUSA Liberator X-Ten SF-5500 are open heel fins with Ez-Strap and Buckle System to allow for quick adjustments with little effort and can be made while the fins are worn to get a precise fit and easy removal.  I wear a men's size 10 Wide shoe and can comfortably adjust the fins to my foot.  It measures about 11 inches from end of the toe to heel strap in the largest position.  The foot box is about 5 inches wide from side to side.  The fin measures about 24 inches long from the heel strap to the tip of the fin and about 8 inches from side to side.  These fins are in good condition with some scratches and scuffs from use and wear, they have no signs of cracks or breaks.  See the pictures for the condition.  These fins have lots use and life left!