LUCKUP 100% Blackout Waterproof Fabric Window Roller Shades Blind [ Excellent Material ] 100% Polyester +Reinforce Thermal Insulated Coating. 100% blackout. 100% UV ray block.Excellent for cool, windproof, rainproof. Suitable for use in bedroom, kitchen, bathroom, etc. Blackout roller shades protect the privacy of you and your family and protects you and your family from UV rays. [ Safety Design ] Special protection for children. Roller window shades are equipped with a chain connector. When your child or pet is entangled in the chain, it will be disconnected by a certain pulling force to prevent the child from being injured. You can adjust the length of the entire window shades by the chain. [ Inside Mounting ] Measure the height, width and depth of the window.The depth is at least 2.5 inch. For inside mount,blind width need to be at least 1/4 inch less than window width. There will be a tiny gap on each side,so the fabricwidth will be at least 1.5 inch smaller total. That is, fabric width is 27.5 inch. [ Outside Mounting ] Lower requirements than inside mount. Roller blinds width need to be 3-6 inch wider than window width,to avoid gaps. And the roller shades length need to be at least 6 inch longer than window length, to make sure to cover the entire window. [ Product dimension] 29" x 79"; The fabric width is 27.5 inch.Color: Grey.Our products are produced under strict requirements.