There are over 7,500 varieties of apples grown in the world. Each can vary wildly in size - from a small cherry to the size of a large grapefruit. 
The Guinness Book of Records states that the heaviest apple weighed 1.849 kg (4 lb. 1 oz) and was grown and picked by Chisato Iwasaki at his apple farm in Japan in 2005. 