Size:Blackout blind drapery fit on windows up to 100cmX57cm/39"x51" , suiting for Roof Window,Sliding Door,Living Room, Nursery, Home Theatre, TV Room.Our Blackout Curtain is new designed,4 sides suction.6 rings on four edges for suction cups. Sliver rings and more suction cups of strong suction and makes the blind hard to fall.No tools are required.Don't need a curtain pole.Easy to put up and take down.No need for drills, screws and measuring.Use correctly and will not fall off.The blackout curtains applies Twill material and can block over 85% sunlight and harmful UV rays,prevents light leakage and offer you maximum privacy.Room darkening Thermal insulatedimprove the sleeping for your indoor life when you at home or travel.Suction cups may be deformed due to the extrusion during the transpotation.you can put the suction cups in to 78~80 hot water for 5-10mins,the shape of the suction cups will be improved.