How to choose right size: To make sure to cover the entire window, shades need to be 4 inches wider than windows wide for outside mount. If your window width is 30", order 34" would be okay for outside mount, order 30" or slightly less for internal installation. Don't worry about blinds height, it can adjust from 0" to 72". ?Pls Note??Fabric width will be 1" narrower than the size of the shade. Zebra Blinds for Windows: Dual-layer fabric for daylight filtering and full night privacy. Easily switch between sheer and privacy. Good ventilation, anti-static, dust-proof and durable. Perfect for living room, bedroom, dining room and office. Cordless Blinds for Windows: Built-in the robust constant force spring-loaded mechanism, smooth and quiet. The cord-free design provides a clean, tangle-free look to the window. Safer for children and pets. Easy to raise up or lower down evenly to gently filter sunlight and stay balanced automatically at whatever position you stop. Easy Installation & Care: Accessory kit includs metal brackets, screws and installation manual to help you install quickly. We also have installation video to guide you through the installation. Pls feel free to email us if you are missing accessories or have any problems, and we will provide you with a satisfactory solution within 24 hours. ?For INSIDE mount, make sure the window frame depth is at least 2", for a flush inside mount is min.3" required. Upgraded aluminum head rail and bottom bar are sturdier to prevent the fabric from fraying, which makes the two layers of fabrics more closely fit, maximizing the effect of shading.