How big do blueberries get?

Blueberries typically range in size from about 5 to 16 millimeters in diameter, depending on the variety. Most commonly, cultivated blueberries average around 10 to 12 millimeters. Some larger varieties, such as the "Jellybean" or "Bluecrop," can reach sizes up to 16 millimeters. Overall, their size can vary based on growing conditions and specific cultivars.