IF YOU WANT A RELAXED EDGE, PLEASE READ...Because these have extra length at the bottom, gathered in a swag effect, they actually look better mounted outside on a window frame or on a door...but, they do not have to be. If you choose an inside mount, just mount them on the front edge of your window instead of back into your window, so that the swagged edge will slightly hang over the sill instead of "pile up" in the sill.
Not recommended for widths wider than 38". If wider than 38", your relaxed roman will look like the photo below, the "swag" in the middle, not being over 38"; still a great relaxed look.
Lined in Blackout Only if Straight across at the bottom.
Lined in Dim-out Only if relaxed across the bottom.