This is a test of commonsense. Complete the next sentence:

How to measure vertical blinds
Go with an inside mount for a cleaner look.
With an inside mount, the blinds sit inside the window or door frame. This allows the blinds to blend in with the window or door for a clean, streamlined look.
Choose an outside mount for a frame without depth. An inside mount requires that the window or door frame has a certain depth in order to fit the the blinds.