The outer members of a window or door. It is the size that will fit into the rough opening or hole the window or door will go into. The Frame should be about 1/2 an inch less than the size of the hole to leave room to make adjustments and seal it in place.
Frame size is displayed in Width by Height order. The first number is always width, followed by the height. It is usually measured in inches.
Example: 61 - 1/2" x 81 - 3/4"
Sixty one and a half inches width by eighty one and three fourths Inches Height.
The Door Frame Size is the entire size of the frame from end to end. It includes the prehung door frame, which is larger than the door slab that swings open.
Here is an image that could help determine frame size:
Doors are very standardized. So if you find it difficult to measure your door opening because of your existing door, The standardized sizing that are close to the number estimate that you come up with usually fit very well. You can request a size smaller if needed, and we can cut your door down to size for an additional cost usually around $200 for custom sizing.
When referring to window frame size, this includes the frame that fits into the rough opening of hole. It includes the head, sill or threshold, the two jambs and the meeting rail of a window. it does not include the size of the flush fins that stick out on replacement windows. These flush fins cover up the edge of the opening or old frame to make your replacement window look good. Here is an image displaying the frame in relationship to the flush fins: