Standard Grade Oysters: Standard grade oysters tend to be harvested wild around the coast of PEI. The quality level and flavour is comparable to a "choice grade" oyster like a Raspberry Point or a Lucky Lime. The main difference is the shape of the oyster. Standard grade oysters tend to be oddly shaped and does not have that distinctive round shape and deep bowl or cup that contains the oyster. They also tend to be a little more difficult to shuck.
For these reasons, the standard grade oysters are not generally desired by restaurants. Oyster producers usually will pack these oysters in 33 ct boxes and offer them at a significant discount to the choice varieties. So if you don't mind having less than perfect looking oysters and taking a little more time to shuck, 33ct boxes are an excellent way to enjoy PEI oysters at a great price!