Coro Signs

Coro (short for coroplast, or corrugated plastic) is a fluted plastic board - the same material campaign and real-estate signs are made of. It's fully waterproof and weatherproof, so it holds up outdoors for months, and it's light enough to hang or stake anywhere. It's the most affordable way to make an outdoor sign. Add grommets to hang it, H-stakes to plant it in the ground, or an easel back to stand it indoors.