To ensure the best fit take time to measure your window carefully. A metal tape measure is best for accuracy. Firstly you will need to decide whether you want your curtains to hang from a track or pole. Both tracks and poles should be positioned 15cm (6 inches) above the window and extend 15-20cm (6-8 inches) either side.
Measure the total width of the track or pole (excluding the finials). Do not measure the window unless it is wall-to-wall.Always allow for overlap; this is an additional measurement normally 2.5cm (1 inch) that allows the curtains to overlap in the middle when they are closed.
Measuring length: Before measuring the length you will need to decide whether you want your curtains to fall to the floor, below the sill or to the sill. Ideally:
Pencil pleat curtains:
Measure from the eye. This is the small metal ring at the bottom of each curtain ring. This prevents the pole or rings from being obscured by the curtain.
Tab top and eyelet curtains:
Measure from the very top of the pole.
curtain measuring guide
Bill Beaumont Textiles curtain measuring guide
Curtain Express curtain measuring guide
Montgomery curtain measuring guide
Style Furnishings curtain measuring guide
Roman blinds may be fitted either inside the window recess or outside the window.
When deciding whether to fit the Roman blind inside the recess the following points need to be true.
To measure a Roman blind to fit inside the recess.
To measure a Roman blind to fit outside the recess.
When measuring for Roman blinds you should always use a metal tape measure as a plastic clothe tape measure may stretch giving a false reading.