1. The top diameter of the drain plug is 5.5 inches (140 mm), the hole of the sink is 4.5 - 4.7 inches (114 - 120 mm) 2. The diameter of the top of the drain plug is 4.3 - 4.5 inches (110 / 114 mm), and the hole of the sink is suitable for 3.5 - 3.7 inches (89 inches (89 inches (9