Mario Bellini office chair for VitraOffice Chair by Mario Bellini for Vitra, 2001. The armchair has a ruffled seat and backrest in red and blue fabric. There is a sliding shelf on the underside of the seat that allows the chair to be adjusted to multiple positions. The office chair has two rounded black armrests and stands on a black metal base with five castors. Creator: Mario Bellini (designer),Vitra (manufacturer) Dimensions: Height: 91. 44 cm (36 in) Width: 59. 69 cm (23. 5 in)