Door Sales

How do you know what size door you want to buy?

For Case 1: There is already a door frame, just need to change the door.

We need to measure the non-protruding part of the door frame (the part where the door is installed)

We need to measure 6 lengths (unit of measurement: inches)
of the non-protruding part of the door frame:

1. Left height from FFL (along the door frame)
2. Middle height from FFL
3. Right height from FFL (along the door frame)
4. Upper width (along the door frame)
5. Middle width
6. Lower width (along the door frame)

For Case 2: The wall is just opened, but there is no door frame.

We measure the wall opening for door installation directly.

We need to measure 6 lengths (unit of measurement: inches)
of the wall opening for door installation:

1. Left height from FFL (along the wall opening)
2. Middle height from FFL
3. Right height from FFL (along the wall opening)
4. Upper width (along the wall opening)
5. Middle width
6. Lower width (along the wall opening)