Accurate measurements are the difference between blinds that look custom and blinds that look cheap. Follow this guide for a perfect fit every time. Tools You Will Need - Steel tape measure (not cloth) - Pencil and paper (or your phone) - Step stool for high windows Inside Mount Measurements Inside mount shades sit within the window frame for a clean, built-in look. 1. Width : Measure the inside of the frame at three points—top, middle, and bottom. Record the narrowest measurement. 2. Height : Measure from the top of the frame to the sill at three points—left, centre, and right. Record the longest measurement. 3. Depth : Measure the depth of the frame from the front edge to the window glass. Minimum depth requirements vary by product. Outside Mount Measurements Outside mount covers the entire window frame, ideal for shallow frames or when you want to make windows appear larger. 1. Width : Measure the overall width you want to cover. We recommend adding 2-3 inches on each side of the frame. 2. Height : Measure from where the bracket will mount to the sill, adding 3 inches above the frame. Common Mistakes to Avoid - Rounding measurements (always note exact fractions) - Using a cloth tape measure (they stretch) - Measuring only once (always measure three times) - Confusing width and height on your notes Special Windows Arched, angled, and bay windows require specialized measuring…