The sign posted on the glass door is used to remind everyone that there is glass in front. What's that thing called?

This is called door sticker, also called bumper strip and waistline. General materials are pasted by cars, and photos are covered with film. The north can be white glue or black glue, but white glue is generally recommended. If you stick it inside and outside, use vinyl. Height varies from 10CM to 20CM, and 14 cm is generally enough. A meter is about a few dollars, usually made by small advertising shops, but they don't necessarily have machines. You can get the lowest price if you find a special photo inkjet factory.