Glass Repairs & Replacement > Pet Doors > Measuring your pet
It is advisable not to guess the size of the flap you will need but to take a few simple measurements to make the right choice. The weight of the pet is irrelevant. The Height and width of your pet are the important measurements that dictate the correct pet flap size.
If you have several pets, then you should use the largest pet to choose the flap size.
Step One - Measure the shoulder width of your pet. Try opening a sliding door to the width you have measured to see if your pet can walk through.
Step Two - Measure your pet from the top of their shoulder blades down to the ground.
| Pet Flap | Height | Width |
|---|---|---|
| Transcat Cat | 17cm | 18cm |
| Transcat Dog | 25cm | 28.5cm |
| Petway small | 24cm | 19cm |
| Petway Med | 30.5cm | 22.5cm |
| Petway Large | 40cm | 26cm |