What paper stocks can I choose for yard signs?

Yard signs are printed on corrugated plastic, often called Coroplast, rather than paper. The fluted polypropylene is waterproof, lightweight, and built to sit outside.

• Standard thickness: 4mm corrugated polypropylene.
• Weatherproof: shrugs off rain, UV, and temperature swings.
• Stake-ready: the flutes slide onto H-frame wire stakes.
• Common uses: political, real estate, and event signage.