Here is a list of the largest and longest dragonflies:
Green-Eyed Hawker, 2.8 inches
Brown Hawker, 2.9 inches
Common Hawker, 2.9 inches
Common Green Darner, 3 inches long
Grey Petaltail, 3.1 inches
Emperor Dragonfly, 3.1 inches
Golden-Ringed Dragonfly, 3.3 inches
Swamp Darner, 3.5 inches
Giant Darner, 5 inches long
Meganeura, 15 inches long in ancient times
Dragonfly field guide from Missouri Department of Conservation
