Each exterior jamb has certain portions that will have the same size. For example, the kerf is 1/2” to accept the weatherstrip. The thin part of the jamb is 3/4″ while the larger part is 1-1/4”. The inset for the door is 2-3/16” wide. As the depth of the jamb increases, the thick part of the jamb will increase as well.
4-9/16″
![](https://learn.reeb.com/wp-content/uploads/2019/03/kba-JambDimensions-4916.jpg)
5-1/4″
![](https://learn.reeb.com/wp-content/uploads/2019/03/kba-JambDimensions-514.jpg)
6-9/16″
![](https://learn.reeb.com/wp-content/uploads/2019/03/kba-JambDimensions-6916.jpg)
6-9/16″ Patio Jamb
![](https://learn.reeb.com/wp-content/uploads/2019/03/kba-JambDimensions-6916-2.jpg)