Large Green Cerignola olives are grown and harvested in the town of Cerignola in the Puglia region of Italy. They are known for their size, considered to be the largest olives in the world. They are so fresh and juicy that biting into a Cerignola olive is similar to biting into a pear, making Green Cerignola olives unlike any olive in the world. Size: “7 / 9” Origin: Cerignola, Puglia Region, Italy.