Blackout Blinds for Windows:Unique honeycomb design with built-in aluminum foil coating inside makes Changshade cellular shades can achieve room darkening light blocking effect and provide perfect privacy protection, and block out harsh sunlight and reduce harmful UV rays to protect indoor furniture and family members. Cordless Design Ensures Safety: No Cord mechanism is perfect for homes with children or pets, and has been certified "Best for Kids". The blinds pull down and stop at any spot, easy to install for inside outside mount, great for bedroom, bathroom, nursey. Size Instruction: All sizes in our description are SHADE SIZE, we ship out true shade size as description. If you order 30"W x 72"H, that is exact shade size you will get, we do not make any deductions for you. For inside mount, shade width 0.25-0.5 inch narrower than window width, shade height longer than or equal window height; for outside mount, plus at least 4" both shade width and height. If the size you need not included, choose Custom Size. Thermal Insulated: Changshade cellular shades blinds with diameter of 1.5'' honeycombs keep out extra air or noise that comes in through the window, providing an efficient barrier to heat and cold air. Unique honeycomb structure helps absorb a mount of sound and "quiet" noisy neighbors. What You Get: Cordless blackout cellular shade, installation brackets for inside or outside mount, directions that make it easy to install and a one-year warranty by Changshade. Whenever any questions, feel free to contact us and we always respond within 12 hours. Customer satisficatin is our top priority. Unique honeycomb design with built-in environmentally friendly aluminum foil coating inside the honeycombs. Changshade blackout cellular shades can achieve 100% shading effect and provide perfect privacy. Our blackout blinds block out harsh sunlight and reduce harmful effects of UV rays to protect indoor furniture and family members.