How long is a hummingbird that is 2.5 grams?

The size of a hummingbird can vary significantly based on the species. Generally, a hummingbird that weighs about 2.5 grams is likely to be around 3 to 4 inches (7.5 to 10 cm) in length, which is typical for smaller species like the bee hummingbird. However, exact measurements can differ among individual birds and species.