1970s Rare Original Blue Oyster Cult Belt Buckle For Sale at 1stDibs A Trip Down South: Oyster Belt Buckle and Strap Duxbury Bay Oyster Shell Buckle Cellar Leather 46 Oyster Shell Belt and Buckle Collection from Cellar Leather ideas. Slight variations in metal color may occur from one casting to the next. Each buckle is unique, custom cast and hand polished. Buckles are roughly 2 1 2" x 1 5 8". Coskata Oyster Buckles fit on a 1 and 1 1 4 belt