Donut sofa design concept is from doughnut interlinked it shape and meaning, the colorful Collocation and the modeling of the concentric circles, do not break doughnuts sweet and cheerful intention. Inverted trapezoidal cylinder on the whole, accorded with human body sitting posture, reduced the friction between foot and sofa. Accessory is circular column, can be use as black rest and also can place goods. Mellow and full, lovely and decent, seemed more casual in space.