Two-Sided Door Hanger Sign: The blank door knob hanger sign is designed in proper size, allowing you to write on both sides, which is suitable for all standard door handles.Durable Material: Made of quality PVC plastic, which is light-weight, but durable and waterproof. Measures about 24x9cm/9.45x3.54inches.Change with Your Mood: Write "Do Not Disturb" or "Keep Quiet" to show others that you are busy and need some quiet space; Or write "Welcome" to show others that you're free.Wide Application: The blank door sign can also be used to make various decorating items. Painting or drawing graffiti on it would be a nice choice!Great Quantity: 20pcs door knob hanger signs are enough to meet your various needs. Also good to work as a reminder signs.