This was one of my first 3D designs for cosplay, Hiccup Horrendous Haddock III outfit from the How to Train your Dragon BOOK series, where he looks differently than the character that was developed for the movies.
Here a picture of me with the clothes and the helmet, and some pictures of the helmet which I designed in Blender and printer on my 3D printer. It was very difficult to glue the 3D printed parts together.
Click here to see the sword of Hiccup Horrendous Haddock III that I also made for this outfit.