Place the inside edge of the helmet pattern on the folded edge of stock, trace it carefully, and cut it out. Cutting the material folded saves time and insures that the final product will be more symmetrical. Folds add strength to the card stock just as they do to the steel of a real helmet. Now would be a good time to punch the holes needed for assembly. Cut on solid lines.
Dotted lines indicate folds.
Breathing holes can be punched in the visor in even rows or creative patterns. The visor viewing slot or opening can be made larger or configured differently. This should be done before assembling the helmet. Plumes, wings, and animals heads or figures can be added to adorn the helmet. Obviously, all decorations of helmet and visor surfaces should be done prior to assembly.