clever signs do not disturb sign - pumping in progress do not open, door hanger 2 pack, double sided, ideal for using in any places clever signs made of a durable plastic 3.5" (8.9cm) x 9.25" (23cm) in size design shown printed on double side with uv- and water-resistant inks can be used indoor or outdoor hole is universal sized and will work with all standard door knobs