This is a 2-Piece Flap that fits Several Pet doors: The Johnson Ultimate Dog/Pet door The PetSafe Ultimate Pet/Dog Door The PetSafe Economy Pet Door

Inner Flap measures 4 1/4 x 7" Inner Flap with Outer Ring measures: color: 5 1/2 x 8 3/4" Material is flexible and dark-tinted Known as a small size or by part# S-VA-11