How big is the single bed in the hotel?

Different hotel beds have different sizes. The size of a single bed in an ordinary hotel is180cm× 120cm, and the size of a double bed is190cm× 150cm. The size of a single bed in a star hotel is 120cm by 200cm, and that of a double room is 200cm by 150cm and 200cm by 180cm. When choosing the size of a hotel bed, it should be decided according to the size of the room, so as not to choose a bed that is too big or too small.