Does a 120×200 cm mattress fit in a small bedroom?

Yes, that's precisely the strength of this size. In smaller bedrooms, studios, and student rooms, a 160×200 or 180×200 mattress quickly takes up too much floor space. With a 120×200 mattress, you can still keep at least 60–70 cm of walking space around the bed, which is the recommended minimum for a comfortable bedroom layout.