What is the difference between a 70×200 and an 80×200 mattress?

The difference is 10 centimetres in width. A 70×200 mattress is the right choice when your bed frame specifically measures 70 cm wide, or when room space is extremely limited. An 80×200 mattress offers slightly more freedom of movement and is also used as one of two mattresses placed side by side in a 160×200 double bed. If your room allows for it, the 80×200 is the more versatile option.