The blinds insulate our bedroom from the cold window.
Measuring: I measured my own blinds!
Installation: I installed my own blinds!
The blinds insulate our bedroom from the cold window. We filled all the air leaks around our windows, but they still felt cold near the glass. With the shade down, we don't feel any cold near the window. We love the day/night option. The blackout shade is really dark and the shades fit tight inside the window frame so no light around the edges.