BLINDS DETAILS: Custom cordless blackout cellular shades, made of environmentally friendly non-woven fabrics. And the cordless design is very safe for children and pets..HIGH QUALITY：In the laboratory test, MYshade cordless mechanical system can withstand 8000 times of up and down pull and keep smooth..INSIDE MOUNT: It requires at least 2inch as frame depth for inside mount. Select the window width and length to make the order. Please make the width accurate to 1/8 and we remove 3/8 inch from the exact measurement width given..OUTSIDE MOUNT: Measure window outer frame width and length. Add 3-5 Inches on the window width and length to get the shades size. We take no deductions for the outside mount , please provide us with the exact size you want the shades to come when filling out the customization form..VERY EASY TO INSTALL: In the package, all the necessary accessories are included, the installation manual will be very helpful for installing the shades, you can complete the installation in short time.