For your consideration, here is a Small Do Not Disturb Hanging Sign from Doorknob Mounted Rubber Stamp, New, no. B-3438, made by PSX, copyright 2003, designed in the USA, made in Taiwan.  The image size measures a little over 1 inch tall by 5/8's of an inch wide.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (538.972o-.5z2)