This is a custom elytra, but this model is not official from the game. This wing was created by me, however, it was slightly based on a mod (Wings Mod link: https://www.curseforge.com/minecraft/mc-mods/wings/files), and on some custom elytra models on the internet. It's not so difficult and complicated to assemble, but it requires a little patience because of its size, which was calculated to be proportional to the size of an articulated character.
1. Click on the papercraft design image.
2. Make sure it has not been resized by your browser (you might need to click the image again).
3. Print using your browser's Print function.