Sofa bed sizes range from small chair pullouts until king size. Available in various sizes, they commonly use mattresses of twin until king type. Between the main seven sizes are: Chair (Cot), Loveseat (Twin), Full, Queen, King, Chaise Sectional and True Sectional.
The length of any such sofa depends mostly on the mattress inside.
Common Sofa Bed Sizes and How to Measure
Chair (Cot) pullout beds have length of 37 until 65 inches and mattress width between 30 and 34 inches. Queen sleeper sofas reach 64 until 96 inches long with 58 until 62 inches width for the mattress. Normal queen sofa bed mattresses 60 inches wide and 80 inches long.
King models measure 76 inches wide by 80 inches long, ideal for big rooms or guest rooms. They give maximum sleeping space, but requier a lot of place when opened.
Loveseat sleeper sofas are around 55 until 70 inches, while queen easily surpass 80 until 90 inches. The size of sofas is important twice: for everyday seating and for overnight rest. Some models lay the bed parallel to the arms, so the sofa width becomes bed length.
Such beds have about 54-inch depth, similar to full mattress.
Recall: all bi-folds are short queens. The usual bi-fold is 72 inches, occasionally called “short queen” or “RV size”. Less common, but possible, is king sleeper sofa, and only Luonto makes king sofa sleepers.
Single sofa beds answer for little places or one guest. Double give place for two folks and fit many rooms. The Crumpet love seat sofa bed of Loaf opens to a single mattress of 93 cm width.
Loaf Brioche sofa bed come with 208 cm or 238 cm width, really generous.
Before choosing sofa bed size, measure the room. Control space around it, when it is sofa or bed. Start with whole room measurements and write a diagram to visualize.
Sectionals and big sofas usually have queen mattresses for more comfort. Small IKEA sofa bed perfect for apartments and do not take a lot when folded. Two-seater models are comfortable, snug and always ready for guests, while three- and four-seaters add seats and bigger sleeping space.
Full Serta sofa beds commonly are shorter than average sofas and fit in little room. Mattress toppers or thick cushions improve the comforttoo.

