We provided you a couple of photos of a Mute Swan's wings and close-up views of the Flight Feathers. On this particular swan, adult Male Mute Swan, the length of the longest flight feather measured 20 inches.

So, depending on the species of swan (Black-Necked Swan, Black-Swans, Coscorobas- would have smaller feathers while the Trumpeter Swan would have the largest size feathers), the size would greatly vary. We hope this information is of benefit and the photos are what you need.

The Regal Swan