Standard round toilet seats fit round toilet bowls typically found in smaller restrooms, homes, and older buildings. They match the round shape of the bowl, so they sit securely on the bowl's rim to prevent slipping and drips. These bolt-on toilet attachments are generally more comfortable for smaller users. Toilets seats bolt onto a toilet bowl and can be lifted on their hinges for cleaning and full access to the bowl. These oval or circular rings should match the bowl shape to keep the seat stable, direct waste into the bowl, and help ensure user comfort. Toilet seats can be used on a newly installed toilet or for toilet seat replacement on an existing toilet.