This papercraft is a chibi Mr. Fantastic, the leader of the Fantastic Four, and a fictional superhero appearing in comic books by Marvel Comics, the papercraft is created by Teddy Massines. The size of finished model is about 349 (H) x 297 (W) x 253 (D) mm.
You can download the paper model template here: Marvel Comics - Chibi Mr. Fantastic Free Papercraft Download