Inside Mount Window Measurement.
Step 1
Measure the inside depth of the window frame, and make sure it is greater than 2 inches.

Step 2
Measure the window's width
Find the width in 3 different places and use the smallest measurement as window width.
Shade width=Window width -1/4 inches
(e.g: Window width=34", Shade width=33 3/4")

Step 3
Measure the window's height
Find the height in 3 different places and use the longest measurement as window height.
Shade height ≥ Window height
(e.g: Window height=60", Shade height ≥60")
Outside Mountwindow Measurement.
Step 1
Measure the window's width
Find the width in 3 different places from the outer-most points of your window frame or trim, and use the widest measurement as window width.
Shade width = Window width + 2~4 inches,This will ensure the window is properly covered.
(e.g: Window width=34", Shade width=36~38")

Step 2

Measure the window's height
Find the height in 3 different places and use the longest measurement as window height.
Shade height = Window height + 2~4 inches,This will ensure the window is properly covered.
(e.g.: Window height=60", Shade height =62~64")