The largest oyster is a Pacific oyster (Crassostrea gigas) and measures 35.5 cm (13.97 in) in length and 10.7 cm (4.21 in) in width, as measured in the Vadehavscentret, Vester Vedsted. Denmark, on 17 December 2013. It was found by the Vadehavscentret (Denmark).
The Pacific oyster (Crassostrea gigas) is from the Danish shores of the Wadden Sea and resides in the Vadehavscentret. This large oyster has another five oysters attached to it! In total, this cluster of oysters weighs 1.62 kg (3.56 lb).
Comments below may relate to previous holders of this record.