Print out the left and right stand pieces at 100%. Cut out the stencils using safety scissors.
Tape the cut out stencils to the cardboard. With the stencil taped, trace the stencil with a pencil. Remove stencils.
Using the safety scissors and following the pencil tracing, Cut out left & right stand pieces from the cardboard.
Connect the two pieces by interlocking the bottom and top slits of both pieces.