WHAT SIZE TO ORDER: This blind will be exactly 45.75 inches wide to ensure the perfect fit inside a window frame that is 46.25 inches wide. All Lumino blinds are precision-cut to be ½" narrower than the ordered width, providing the ideal inside mount. For inside mounting - measure & order the exact width of your window. For outside mounting - add 4 inches to your window width, this ensures full coverage. The sizes listed are WIDTH x HEIGHT. 100% BLACKOUT & THERMAL INSULATION: Lumino's high-quality, dual-layer, blackout fabric blocks out light and ensures maximum privacy. The thermal-insulated polyester fabric protects your interior from damaging UV rays, preventing fading of furniture and floors while also improving energy efficiency by keeping heat out. Perfect for use in bedrooms, living rooms, and basements, this blackout shade delivers the perfect balance of functionality and style. PREMIUM STYLE: Unlike other shade manufacturers, Lumino's blackout Roller Shades includes a color-coordinated valance to hide the fabric roller and mounting hardware. The fabric shades provide a custom looking high-end appearance at an affordable price. Crafted from high-quality woven polyester fabric, these indoor window shades complement any décor. The durable fabric is easy to maintain and offers 100% blackout and privacy when lowered. CUSTOMIZED IN THE USA & EASY TO INSTALL: Lumino cuts your blind to the exact size, right here in the USA at the time of your order. Installation is made easy with simple step-by-step instructions that were developed in our US office. DEDICATED SUPPORT: Lumino's expert customer support team is based right here in the USA, ready to assist with any questions or concerns you may have. Contact us anytime at support@luminodecor.com. Lumino's 100% blackout roller shades are easy to install and provide you with the perfect fit! We custom-cut our blinds to the quarter-inch, ensuring you receive the right sized shade. These roller shades protect against harsh light and block harmful UV rays while ensuring complete privacy. They effectively darken your room by blocking all incoming light. Installation hardware and easy-to-follow instructions are provided, while our customer support team is ready to help with any questions you might have. A cordless design allows you to effortlessly open and close the shade using the hem grip. The smooth-operating spring lift system allows the shade to stop at any position and lets you adjust the tension as needed.