While a T-cushion may sound like a mysterious designation or shortcut term for a particular type of sofa, the name simply indicates the shape of the seat cushion on the couch or chair. Looking at the cushion's outlined shape, it resembles a chunky capital "T." The extensions on each side of the cushion wrap snugly around the front sides of the sofa, beneath the armrests.
If your T-cushion sofa is in need of new upholstery or a new seat cushion all together, finding a simple means of covering it may be a tad more complicated than addressing a similar problem on a sofa with standard rectangular or square cushions. Slipcovers designed for square and rectangular sofa cushions won't fit a T-cushion, so you may need to search a little farther to find a suitable covering. Making one yourself also requires a bit more effort than recovering a square or rectangular cushion, thanks to the extra arms on the T-shape. Many T-shaped cushion couches also come in loveseat size because they comfortably fit only two people.