Most of the blueberries sold today are “highbush” or “cultivated” blueberries. “Lowbush” or “wild” blueberries are from a different species than cultivated blueberries, but are part of the same plant family. Highbush varieties can grow up to 15 feet (4.6m) tall; the hardy lowbush blueberry plants are only about 1 foot (0.3m) high.
Blueberries are also classified into a variety of sizes, from small, approximately 90 to 250 berries per cup (236.6ml) to extra large, less than 90 berries per cup (236.6ml).