Each is a piece of art. Made one at a time by hand, designs are hand-cut from hardwood plywood, weather treated, hand-painted in acrylics then coated in epoxy resin. There will be variations and imperfections among the designs and on the backs. Wood is a natural product, so just like your traditional wreath, eventually, if exposed to really harsh elements, the wood will break down. The painting and resin will last a long time. Just like your Christmas tree, you may have to part ways with the door hanger some day. Many hours go into the making of these pieces. If they were painted on traditional canvas, the price would be significantly higher.
That said, these door hangers are made to hang outside. Many people choose to hang them inside. They measure generally 24"x 22"x.25. They are meant to be seen from the curb, providing whimsy and color from afar, and special treats up close.