Four sizes of round toilet seats are included for a universal fit. Please refer to Figure 2 and Figure 3 for measurements. Measure your toilet seat before ordering to determine the correct size. Easy to fit fixing provides straightforward installation and good adjustment to suit a number of pans. Easy cleaning Quick Release lets you remove the seat for thorough cleaning, including the area between the hinges. Slow close and quiet operation The seat closes slowly and quietly to prevent slamming. It protects the seat from bumps and closes quietly every time, making it suitable for use at night without disturbing others. Use scenarios Family bathroom upgrades: Ideal for households with children or seniors who need a secure, properly sized seat and easy maintenance. Shared or multi user bathrooms: Quick Release cleaning simplifies hygiene maintenance in apartments, student housing, or shared facilities. Quiet, nighttime use: Slow close operation minimizes noise, helping to keep bedrooms undisturbed during late hours.