Measuring for roller shades is simple. It's just two easy steps. In this short video, you'll see just how easy it is to measure for an outside mount. Outside mount shades are a good choice if an inside mount is not possible due to little or no window depth. Outside mount shades are mounted outside the window opening on either the wood trim frame or adjacent flat surface area. The product details page on our website provides information on how much flat space is required around your window to install your shades. When you specify an outside mount, we will not take any size deductions. Your shade will be made at the exact size you specify. When measuring for any window covering, it's important to use a still measuring tape and round to the nearest 1/8 of an inch increment. Your first step is to determine the width of the blind you will order. If you have trim around your window, simply measure to the far edges of your trim from left to right. If your window opening has no trim around it, measure a distance from point A to point B that includes any extra width you may desire for light gap coverage and privacy. We recommend adding 2 to 3 inches to each side. Your second step is to determine the height of the blind you will order. If your window has a protruding sill, start from the sill and measure 3 inches beyond the top of your window opening in order to accommodate for mounting hardware. If your windowsill does not protrude, we suggest you begin your measurement 2 to 3 inches below the sill for maximum coverage, and then measure 3 inches beyond the top of your window opening to accommodate your hardware. Record your measurement to the nearest 1/8 of an inch increment. This is the height you will order. We will not take any size deductions or additions. Your blind will be made the exact size you specify. Now that you have completed these two simple steps, you're ready to place your order. It's that easy. [MUSIC PLAYING]