cow black and white do not disturb plastic door knob hanger sign - blank graphics and more your room is your sanctuary. so mark your territory with one of these handy door hangers from the creative minds here at graphics and more. impossible to overlook, the colorful design will deliver your message clearly to passersby. whether you're trying to keep intruders out or invite visitors inside, this unique product will ensure that all who enter know exactly what to expect on the other side of the door.<br><br>made of a 3.5" x 9.5" durable thick plastic and printed on one side with uv- and water-resistant inks, these hangers will hold up well to either indoor or outdoor use. the hole is a universal size, large enough for use with all standard door knobs.