Important Inside Mount Measuring Instructions: This cellular shade is the exact size - no deductions are made. Measure the width across the top, middle, and bottom of window. Ensure your window measures 30.625" to 31.5" wide for a 30.5" wide cellular shade. This allows proper fit with minimal light gaps. Measure the height from the top of the window to the windowsill on the left, middle, and right of the window. The largest measurement will be the height you order. 100% BLACKOUT & PRIVACY: Blocks out 100% of incoming light, while also offering 100% privacy. NOTE: In order to get the full benefits of the blackout material, please make sure that the width of the shade overlaps your wall or window frame by at least 1 inch on each side to account for light coming in from the sides of the shade. EASY INSTALLATION & HARDWARE INCLUDED: All needed hardware for mounting inside or outside a window frame is included, along with easy-to-follow instructions.INSULATING CELLULAR DESIGN: Our single cell honeycomb construction provides insulating benefits for your home by reducing air leaking through your windows. This design keeps cool air in your home during warmer months and warm air in your home during colder months, which can help lower your energy bills. SAFE for PETS & CHILDREN: Our cordless lift system keeps unnecessary cords away from your pets and children. CORDLESS LIFT: Our innovative cordless lift system makes it easy to raise and lower your shade to your desired precise height. Our shade utilizes a pulley system that allows you to pull down or push up the bottom rail to get your desired height.