Product Functions:Our roller shades made of 50% blackout fabric,feeling soft and smooth.It can blocks out 50% 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. Product Width:Shades Selection Size: 13" W x 79" H,13"W = 12"shade fabric width + 1" mounting hardware width.(Attention:The fabric size is 1" less than the Listing size.) Product Length:The shades maximum drop length 79". Selection Size Guide:Shades Selection Size: 13" W x 79" H,Suitable for inside mount window width 13" 13.9".Window depth need more than 2 Inches for inside mount, otherwise please choose outside mount.