Aquatic Technology 7909WS1812E 18"x12" Blue Notice Pool Closed for Season Sign measures 18 x 12 inches, is printed on .040 mil Styrene Plastic, and is designed for preventing patrons from trespassing when the pool is closed. Our Notice signs indicate a statement of company policy as it relates to safety of personnel or property. This sign is lightweight, durable, and waterproof for indoor or outdoor use.