scatter cushion 
noun
A small cushion designed to be placed randomly so as to create a casual effect and to be moved as required.The beautiful three-seater Balinese wooden sofa decorated with bright pink and white scatter cushions was bought from a hotel on a recent trip....
- In the sitting room, a classic 2001 look might be a plain cream leather or natural fabric sofa, brightened up by scatter cushions covered in an animal-print fabric or suede.
- For a comfortable seat, add a series of scatter cushions to match the rest of the curtains and soft furnishings in the room.