Herfuerry are committed to bringing better life experience to pets. We have a strong and professional design team and high-quality factory resources. Applications: Outer Size 9.8" x 9.3" x 2.16"(W x H X D), Inner size:7.08" x 7.48"(W x H), Cut-Out Size: 7.7" x 8.3" (W x H), suitable for installation on doors and thin walls, suitable for cat lighter than 35 lb and waist circumference shorter than 23.62".