Easter Joy Yard Sign Letters - He Is Risen Easter Yard Décor - Happy Easter Religious Yard Decor Cutout Letters with Metal Stakes. Economical and durable, our Coroplast Yard Signs are a staple of outdoor advertising. These outdoor Easter Joy Outdoor Letters full color direct printed graphics are vertically fluted for use with a D Wire. Coroplast is typically used for yard, parking, real estate, and election signs. They are waterproof.