Apples pollinated at the start of the season had more space to grow, making them larger in size. While a typical Cox apple is 68-75mm in diameter and 143g in weight, the Extra Large apples are 85-90mm and 225g.
Waitrose apple buyer Greg Sehringer said: "We have found several new ways to support our growers through some difficult times of late, and we are sure these extra large apples will be popular with our customers. Buying British is hugely important to Waitrose shoppers and the taste is not compromised because the apples are larger."
Waitrose also sells Weather Blemished Apples, which have been damaged by frost and summer hail.