PetSafe Pet Yard for Pets Up to 40 lbs. This durable and paintable plastic pet Yard features a snap-on closing panel for added security. It is designed to fit Yards 1/16" to 2" thick and is ideal for storm Yards. The cut-out size is 9-1/4"W x 14"H, and the flap opening measures 8-1/8"W x 12-1/4"H, providing easy access for your furry friend. Overall dimensions are 10-5/8" x 15-1/8", with the flap opening being 8-1/8" x 11-3/4".