What is a half couch called?

A half couch is also called a chaise lounge. It is an upholstered sofa in the shape of a chair that is long enough to support the legs. They are more compact and work beautifully when styled with a footstool or accent armchair in a larger space, but look equally stylish standing on their own. 1stDibs sells different types of half couches ranging from antique and vintage to new and contemporary.