Linen Avenue Custom Cordless 46 1/2 W x 60 to 66 H Platinum Blackout Cellular Shade Linen Avenue blackout shades allow no light to pass through the fabric (they are foil lined) For inside mount measure your window horizontally in three places; top, middle and bottom, use smallest measurement and subtract 1/4in from the width of your window measurement, and order this width For outside mount add 4 inches to the width of your window measurement, and order this width . This will allow for a 2 inch overlap on each side of the window Each 9/16 inch single cell honeycomb cordless cellular shade is child and pet safe with a smooth cordless operation that conforms with CPSC child safety guidelines End caps, simple snap-in brackets (that fit for both inside mount and outside mount applications), and mounting hardware is included