How To Measure Your Blinds
For blinds that sit in the window recess, first ensure that the recess is at least 75mm deep to accommodate the blind operating mechanism. Measure the total width and height of the recess from edge to edge in millimetres. Remember to measure at several points to allow for any slight irregularity in your windows and then use the smallest measurements to ensure your new blind will fit the recess.
For blinds that hang outside the window recess, decide how much overlap you would like the blind to have on either side of the window. It is recommended to allow at least 45mm on each side. Measure the total width and height you would like your blind to cover allowing an extra 38mm if you plan to fit a roller blind to accommodate the blind operating mechanism.