thats about 5 inch.
dont matter how big the sunstrip is, put it against the screen and pull it down however far you want it.
run your nail along the window rubber to leave a mark, take all the backing off n stick it down, so it overlaps onto your roof, you might have to pull it off a couple of times to get it perfectly straight but most are solid stickers and they wont rip or tear.
cut around your window rubber carefully with a blade and then tuck the excess sticker underneath the rubber so no water gets under it, use a credit card or a filler spreader.
hope this helps