Polyester & Polyester Blend For Inside Mount: The shade will be the exact size with no deductions. Measure the width of your window at the top,middle,and bottom. For a 58" wide shade, your window should measure between 58.25" to 59" wide, for a snug fit with minimal light gaps. Unique honeycomb construction offers insulation and sound absorption. Made from a light blocking fabric to provide a room darkening environment which provides privacy. Features a cordless lift system that is safe for children and pets. Hardware is included for inside or outside mounting, preferably on drywall. Each cordless cellular shade comes with a matching PVC headrail and bottom rail. We suggest that you order a quantity of one item before ordering a greater amount to test the overall product. We try to edit our photos to show the samples as life-like as possible, however the actual color may vary since each computer monitor has different capabilities to display colors and that everyone sees these colors differently. This product is highly recommended for indoor use only. Questions? Please contact us at the Calyx Interiors website.