【PRODUCT DETAILS & Selection Size Guide】:Shades Selection Size: 20" W x 79" H, Suitable for inside mount window width 20"～20.9"①20"W = 20.9"shade fabric width + 1" mounting hardware width.#(Attention:The fabric size is 1" less than the Listing size.)②The shades maximum drop length 79".③Window depth need more than 2 Inches for inside mount, otherwise please choose outside mount.【PRODUCT FUNCTIONS】Our roller shades made of 85% blackout fabric, feeling soft and smooth.It can blocks out 85% sunlight and Room darkening. It can reduce room heat and cold loss through window during winter and summer, helping cut your energy bills. It also works well in noise reducing and privacy protection. Great for bedroom, living room, bathroom, kitchen, French door and office.【SAFETY DESIGN】:To ensure safety to your family, we provide a safety device to attach the chain to the wall and all the relevant safety instructions.【EASY TO INSTALL】:Our roller shades include the corresponding full set of accessories and pictures and video installation instructions.The upgraded rotating Clutch can help you load and unload shades quickly.【100% SATISFACTION】:We provide high-quality product and service for every customer, If accessories are missing or broken, please message us and we will resend the accessories ASAP. And you have any questions please feel free to contact us, we will solve it for you within 12 hours.