Precise measurements are vital for roller blinds that enhance your space seamlessly. For Inside Recess Roller Blinds, measure the window recess width and drop at multiple points, using the smallest values to accommodate irregularities for a snug fit and optimal light control. For Outside Recess Roller Blinds, measure beyond the window frame to ensure complete coverage and a polished look. Use a metal tape measure, record measurements in millimeters, and double-check for accuracy. Properly measured blinds boost aesthetics, privacy, and light management, delivering a sleek, tailored appearance for any window.