According to the U.S. Department of Agriculture, an average-sized banana weighs approximately 4 ounces and measures at least 7 inches -- but less than 8 inches -- in length.
How long is a whole banana?
Small (6–7 inches, 101 grams): 23 grams. Medium (7–8 inches, 118 grams): 27 grams. Large (8–9 inches, 136 grams): 31 grams. Extra large (9 inches or longer, 152 grams): 35 grams.
How long is a banana in CM?
The average banana is about 18 to 20 centimetres (approximately 7 to 8 inches) long.
What is the actual size of a banana?
Assuming “medium” can broadly mean “average,” the USDA identified the average banana as being between seven and eight inches long. Similar to the USDA's figure, the site Bananas for Scale assumes the average banana is seven inches long.