Searching for a nice pair of window treatent in my living quarter horse trailer I couldnt find anything close to what I imagined. So I decided to make my own Blackout Panel curtains in the color 'Plum'. It turned out amazing, so I made another pair to sell in 'Mocha', a more neutral color. 
These curtains are right now 25" long, but can be altered for your preferences. 
The "Plum" pictures show how it looks finished.