ARGENTINIAN POLO BELTS Â UNISEX Carlos Diaz Equestrian Polo Belts. In Argentina, where polo is king, the snappily-dressed locals call these polo belts Â they were originally made in team colours. Our polo belts are designed by us and manufactured to our high standards. Components include brass buckles and fabulous drum-dyed black buffalo leather which improves with age. Each belt is hand stitched that takes 5 man hours. Each belt will fit a waist from 30 inches to 40 inches which equals to 76cm - 102cm.