Plastic 3 5/8 Universal Black Cup Holder 3 5/8 Universal Black PLASTIC Cup Holder Top of Cup OUTSIDE Diameter (Lipped Diameter): 4.25 inches. 10.795 CM Top of Cup INSIDE Diameter: 3.515 inches. 8.9281 CM Depth of Cup: 3.15 inches. 8.001 CM Bottom of Cup Diameter: 2.715 inches. 6.8961 CM