Familiarize yourself with popular brands and how much they cost at different retailers. Potty seats are also called "trainer seats," so use those keywords when searching online.
Talk to your pediatrician and consult potty-training books and articles online about potty-training strategies. Even after researching what's best for you and your child, you should be willing to try different potty seats if the first option doesn't work out.
Take your child shopping with you if he seems enthusiastic, or at least willing, to try using the potty. After narrowing down seats based on your budget and preference, allow your child to give input on which seat he likes. The seat your child likes is more likely to be used successfully.
Shop around for a seat with a sizable splash guard if you're potty training a boy. You'll also want the splash guard to leave room for him to stand in front without feeling confined.
Inspect potty seats that come with a step stool. These designs may help your child reach the toilet more easily. Some models also convert to a step stool to help your child brush her teeth and wash her hands when she is a bit older.
Examine each seat for seams, crevices and detachable parts. The fewer of these there are, the better off you will be. These things attract germs and can even pinch skin. Also look for a seat with smooth edges and a sturdy base that won't tip easily when you push down on the sides.