Doggy doors come in various sizes for different sized pets. Sizes can vary from 5 1/2 inches x 7 1/2 inches which is good for a small pet up to 15 inches x 24 inches for an extra large dog.
A pet shop, or the website for a pet shop would be the best place to purchase a doggy door. Some websites even specialise in just pet doors, for example Pet Doors Online.
You can purchase a doggy door that has a lock to keep out intruders. Also, many doggy doors are too small to have someone get in. My main concern would be other small animals getting in.
You can by special doggy doors that lets the dog inside byt not out so the cat can stay inside
6x5 IN THE FRONT DOORS AND 4x6 IN THE REAR
Its called doggy doggy
Cornithian doors is an Australian company that offers various sizes of doors. They have the typical 50 cm by 200 cm door, and have 10 cm increment increases if a larger door is necessary.
Because there are no building codes governing closet sizes, there is no such thing as a standard size closet door. There isn't even a standard style. Some are prehung, others are sliding doors and still others are bi-fold doors. Some common sizes for bi-fold style doors are 24 inches by 80 inches and 30 inches by 80 inches.
I replaced mine and they are 6.5" in the front doors and the rear doors. The tweeters are 1".
4x6 in the doors, 6x9 in the rear
The KraftMaid Cabinetry company unfortunately does not sell glass cabinet doors. They do however sell cabinet doors in many different sizes, finishes, and styles.
4X6 in the Dash, 6.5in. in the doors.
FRONT DOORS ARE 5X7 OR 6X8