McCartney sofa has high comfort with low proportions as if the sofa rises from the floor and has a very good balance. The height of the backrest of the sofa has been reduced, preserving a uniform height throughout the entire length to emphasize the horizontal expansion. The sofa arm has also been lowered to create a sense of greater breadth and depth without sacrificing the horizontal expansion of the seat. In addition, the seat structure placed cushions and is integrated with the bottom base to give the appearance of being thin while ensuring comfortable sitting.