Size: Elongated It is suitable for most standard elongated toilet seats ( Length 18.5", Width 14.2", Mounting hole distance 4.5" ). We will gladly help if you're not sure your toilet size. Slow close The toilet lid and toilet seat can be closed slowly and quietly, which will not cause loud slamming or hand pinched. It also will not wake up your family with noise during sleeping time. Tap forward, then you can see the seat and cover closing slowly by themselves so that the user doesn't have to turn down the seat by bending. Quick Release for Easy Cleaning The seat is equipped with a button on its side which upon clicking detaches the toilet seat and cover for easy cleaning.