[This is an elongated toilet seat] Use a tape measure to measure the toilet size and choose the right size. This round toilet seat fits 18.5*14.3 inches(about 48.9*34.9 cm) toilet, suitable for most standard elongated toilets with fixing holes from 5.2 inches(about 13.9 cm) to 6.3 inches(about 15.9 cm) to 6.3 inches(about 15.9 cm). [Ergonomic Design] The elongated toilet seat is ergonomically designed with polypropylene plastic, soft and comfortable to sit on. The surface of the toilet seat is smooth, just wipe it with a soft towel to keep the built-in seat bright and clean! Soft Closing Hinge SystemAdopting innovative soft closing technology, the thick folding hinge closes slowly without worrying about the "bang" noise. At the same time, it ensures that the toilet seat is not affected and extends the life of the toilet seat cover. A quiet indoor environment for your family! [Made of High Quality Material] It is made of eco-friendly, high quality, white polypropylene plastic, which is more durable than other ordinary plastic materials. It is neither too soft nor too hard, not easy to deform, resistant to pressure, yellowing, fading, peeling or cracking. [FOUR RUBBER BUMPERS DESIGN] We use four rubber bumpers to increase friction, fix and prevent sliding, better than ordinary plastic bumpers. [EASY INSTALLATIONThe toilet is a top-fixed toilet. After placing the oval washer into the mounting hole of the toilet seat, insert two bolts into the toilet seat, then place the round washer and disk nut underneath and tighten at the top. After installation, the valve seat will not loosen, safer to use! Modern Home BathroomThis toilet seat features a modern interior design that seamlessly blends traditional and modern bathrooms with a beautiful design that complements popular bathroom dcor. Worry-free shopping experienceThe toilet seat is damaged due to quality issues, please contact our after-sales team for replacement. Happy shopping, if you are not sure about the toilet size, we are happy to help you, please feel free to contact us!