To craft a life-size cardboard cutout, gather cardboard, markers, glue, and scissors. Visualize the design, including pose and clothing. Trace the image onto cardboard and cut out precisely. Assemble the cutout by gluing or taping the pieces. Ensure accurate proportions and size. Decorate with markers or paint. Maintain stability by using sturdy cardboard and reinforcing the structure. Resources for materials and tutorials are available at craft stores or online.