A large shipping box could work, or an appliance box. With boxes, if you need to use part of the flap to get the full 18 inches, you would just need to have multiple. Web how to make a cardboard wreath to decorate.
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DIY CARDBOARD CHRISTMAS WREATHS 4 WAYS A Life With Frills
Diy & crafts with mirna.
You could also use foam core posterboard.
30k views 8 years ago.