Bunk Beds and Lofts Bunk beds and lofts have been a staple of children's bedrooms for decades. With a variety of configurations available and double-duty furniture, they can add style and functionality to any child's bedroom. The typical bunk bed is two twin-sized mattresses stacked on top of one another. https://www.bunkbedsstore.uk/products/avalon-midi-sleeper-bunk-bed-single-size