Size (approx.): 30L x 27W cm Usable inner dimensions of toilet seat: approx. 24.5L x 20W cm Target age: Approximately 1.5 years old to 6 years old Simply place it on the toilet seat, so it's very easy. Vinyl coated, and the seat is removable for easy cleaning. My daughter, who hated even going into the toilet, started potty training by going to see her favorite characters, Skye and Everest. There are no noticeable stains, and it has been wiped with disinfectant, but please refrain from purchasing if you are concerned.