This is a life size Shield of the Captain America, based on the Avengers. You can build one for cosplay. The paper model is designed by ScannerJOE. There are other Captain America papercrafts here: Captain America Paper Crafts.
Tipps from the designer [ScannerJOE]: The 1:1 versions are big papercrafts, you must cut the margins using the line guides in the corners, then join them to complete the pattern. Paste the model to bigger cardboard sheets to make it stronger.
There are two versions for this paper craft: with texture and without texture. You can choose one which you like. Download the avengers papercraft here: Avengers - Life Size Captain America Shield Paper Model Free Download