Correct measurements are essential for a successful roller blind setup. For Inside Recess Roller Blinds, measure the recess width and drop at several points, choosing the smallest values for a precise fit. For Outside Recess Roller Blinds, measure beyond the window frame to ensure complete coverage and reduce light leakage. Use a metal tape measure, record in millimeters, and confirm measurements to avoid errors. Well-measured blinds enhance window aesthetics, improve light control, and boost privacy. These tips make measuring for inside or outside recess roller blinds straightforward, delivering a stylish, custom finish to transform your space.