Good sleep can't be achieved without it！ The 4 advantages of blackout curtain: 1.Block out sunlight: These blackout curtains are made of tightly woven to reduce unwanted sunlight. These curtains will stop light from passing through thanks to special treatments and extra tight woven fabrics to help you control the light levels in your room. 2.Help sleep: Being awoken by the sun is actually good for you, but there are times when darkening a room aids in sleep especially for napping children, shift workers or others with non traditional sleep schedules and for blocking artificial night time light such as from a streetlamp. 3.Energy efficient: They can decrease the amount of money spent on heating and air conditioning because of the curtain's ability to reduce the amount of heat lost in cooler months and reflect heat in the summer. 4.Privacy protection: If you've ever been kept awake by irritating little noises from the street below that pull you back from the edge of blissful sleep, you'll appreciate the noise reduction abilities of our blackout drapes. The thick blackout fabric of our readymade blackout curtains helps to dampen noises, contributing further to the peaceful sanctuary you need when you are drifting off to sleep. Size Chart 27.5x39 Inch x2 40x63 Inch x2 40x84 Inch x2 52x52 Inch x2 52x63 Inch x2 52x72 Inch x2 52x84 Inch x2 52x90 Inch x2 52x96 Inch x2