Dr. Gary Kirkilas, a pediatrician at Phoenix Children's Hospital and American Academy of Pediatrics spokesperson, recommends looking for potty seats that include features that limit slipping and increase stability, such as rubber stoppers on the underside and side handles for gripping.
For boys, Kirkilas finds that a splash guard is helpful for preventing messes. "Some potty seats include a step stool, which can be helpful for parents who are physically unable to lift the toddler onto the seat as well as providing support to the child’s feet as they bear down for a bowel movement," he adds.
Lastly, Kirkilas recommends looking for potty seats that have roughly the same oval or circular shape as your toilet.