Sign-themed door hook Can be displayed as is. Can also be used to hang hats, etc. Door / folding door thickness is approx. 1.2 - 1.4 inches (3 - 3.6 cm) / Door and top of the gap is required for doors and doors with a minimum of 0.1 inch (3 mm) / For use with regular flat surfaces indoors / Please avoid using on glass doors.