What size does the sofa bed fold out to? 31 May 2023 04:14 Our sofa bed folds out to a full size single, double and queen mattress, so you or your guests can relax like royalty! Related articles Do I need tools to assemble the Sofa Bed? Are the covers removable? What is the recommended weight capacity? How do I protect and clean my sofa? How do I return something?