Dimension Diagram: Product Features: Manufactured by Mirabelle, a private-label brand of luxury products developed for discerning showroom shoppers Elongated toilet seat with matching lid Slow close system ensures seat will never slam shut Custom fit to complement select Mirabelle toilet bowls Made from heavily weighted molded solid plastic Seat is ergonomically contoured to provide maximum comfort to the user Ultra secure mounting assembly Product Specifications: Overall Length: 17-7/8″ (measured from the back of the hinges to the front most part of seat) Overall Width: 14″ (measured from left most point to right most point on the seat) Inside Length: 11-7/8″ (measured from the back to the front of the inner opening of seat) Inside Width: 8-1/2″ (measured from the left edge to the right edge of the inner opening of the seat) Adjustable installation points for quick and easy mounting Made from heavily weighted solid plastic