D'DecorIf colour, pattern, texture are important then size, shape and the number of cushions are also equally important. You need to be in control of all that before choosing the right one. There are many different and designer cushions, but not all will necessarily match the style you are seeking.
The choice of the size of the cushion depends on the size of the couch, armchair, sofa or bed for which you are buying. For eg., you can use small or medium-sized ones as a bed cushion to complement the pillows. If you want to create a lounge setting, then choose bigger ones with bold colours so that you can hold on to them while reading or watching TV