(1 square): Suitable for length sofas 80-115 cm, (2 square): suitable for length sofas 114-178cm, (3 square): Suitable for length sofa 178-229cm, (4 square): Suitable for SOFAS LENGTH 229 -295CM, (Relax Armchair): Suitable for length sofas 65-100cm Stay in place, the foam pieces remain crouching on the cushions to keep the shape of the sofas covers. If you believe that the foam pieces are not enough, place the excess fabric in the space between the backrest and seat cushions. Elastic background keeps the sofa cover that covers the entire sofa, even if it moves.