What does the room size sign mean?

Room size identification refers to house number, floor identification and distribution identification, entrance identification, orientation identification and orientation identification in public places, prohibition identification, organization identification, safety and fire precautions, etc. In the hotel room. According to relevant information, small signs such as guest rooms and public places generally refer to house numbers, floor signs and distribution signs, entrance signs, direction signs and orientation signs of public places, prohibition signs, organization signs, safety and fire prevention instructions, etc.