What is the length of a peregine falcon?

The peregrine falcon typically measures about 15 to 20 inches (38 to 51 cm) in length. Males are generally smaller, averaging around 15 inches (38 cm), while females can reach up to 20 inches (51 cm). Their wingspan ranges from 29 to 47 inches (74 to 120 cm), making them one of the fastest birds in the world.