Measuring is where window covering jobs are won or lost. A reveal that is twelve millimetres narrower at the bottom than the top is normal in a Sydney house, and it is the difference between four neat blinds and four that nearly fit.
These articles cover the decisions you make before anything is ordered. Whether a blind sits inside the reveal or on the face of the wall. How much depth you actually have above the window once the architrave and the flyscreen are accounted for. What child safety standards require on a corded product. What to look for in a quote so you can compare two of them honestly.
We measure on site, every time. Measuring off a plan is how blinds end up fifteen millimetres too narrow.