Measuring Guide

Measuring for Curtains

Width: Once you’ve fitted your curtain pole or track, refer to its length to find the correct curtain width, rather than the window itself. Measure from the end of the pole or track to the centre, including any overlaps. The curtain widths we give are for the pole width, not individual curtains. Note the measurements down on paper. Be sure to check all measurements twice stating whether Centimetres or inches. Use a metal tape measure for the most accurate measurement.


Measure the width of the curtain track (diagram A) or pole between the finials (diagram B). lf the track overlaps in the middle then add the length of the overlap (diagram C).

Drop: Curtain length is a personal choice but as a guide, for window sill length curtains, measure to around 1 to 1.5cm above the sill, or add this amount if you prefer them to hang below. For full length curtains, measure to 1cm above the floor. The type of heading your curtains have will affect the drop length required:

Eyelets – For eyelet drapes measure from the top of the pole to finished drop then add 4cm. Double fullness is required. Note that if you over measure for eyelets there is no room for adjustment, like there is the with the pleated headings.

Tab top – For tab top drapes measure from the top of the pole.We recommend you attach your pole 15cm above the window to minimise light exposure. 1.5 times fullness is required.

Pencil pleat – We recommend the use of a pole, not a track to ensure the pleats hang correctly.

Measuring for Blinds

Depending on your personal preference, you can hang your blind inside or outside the window recess. Decide on this first before measuring, as this will determine the width and drop. Before measuring, decide whether you want to mount the window treatments inside or outside the window opening. You can mount valances, shades or blinds either outside or inside, while cornices look best when mounted on the outside of a window frame. On roller blinds the actual fabric width will always be 35mm less than your measurements to allow for the fixings.


Inside the window – Measure the depth and width of the window recess in a number of places (as walls are not always straight). Use the narrowest measurement to the nearest millimetre as your guide. The recess will need to accommodate the pulley mechanism and the fabric drop will be the length it hangs at its most extended. When measuring the width of the recess take a measurement at the top, middle and bottom and take a note of the lowest measurement. This ensures that the blind will not snag when in use (diagram D).

Outside the window – The blind will need to extend beyond the window width. Again, measure different points of the window width and use the narrowest measurement, remembering to add 38mm for the pulley mechanism. Then measure the drop. This will be how far the fabric hangs at its most extended. For width size measure the width of the window and add approximately 4 in (10.2cm)at each side of the window to allow an overlap (diagram E).

Measuring for Curtain Poles

Your choice of pole/track will be determined by the style of curtain you want and the space you have either side of the window. Most poles can be ceiling or wall fixed. For Poles especially close to the ceiling, you will need to order a pole that can be ceiling fixed.


Pole width – To find the right size pole, decide where you want it to be fixed: on or above the window. It should extend beyond the window at either side by 10-20cm to allow the curtains to be drawn back away from the window. It should also sit about 15cm above the window to minimise light when curtains are closed. Allow enough space for finials (the decorative ends) if required.


Measuring for Shutters

You can use interior window shutters in any room and sometimes do not need a valance or curtain. Available in numerous colours and stains, shutters look best when painted or finished the same as the rest of the window frame. Attractive, light regulating, insulating and fit into almost any interior due to their simplicity and design. You can mount them both inside or outside the window. If you are doing the installation yourself, leave room to swing open or fold back the shutter panels.

Inside Mount – the shutter is mounted inside of the window opening. For Inside Mount: Use the SMALLEST of the three measurements to determine the width and height.

Outside Mount – the shutter is mounted outside of the window opening. Measure diagonally first. If the difference between the two measurements is greater than 1/4”, consider an external mount. For Outside Mount: Use the LARGEST of the three measurements to determine the width and height. Refer to your shutter fitting instructions for fitment. There are many kinds of shutters available.

Measuring for Valances

Measure the length of the valance track plus the length of both returns (diagram F).

Device REMEMBER, WE INCLUDE FITTING OF ALL PRODUCTS – FOR YOU AS A CUSTOMER. These guides are a reference only if you really want to have the trouble of trying to fit yourself and possibly damaging your windows.

Measurement Converter

Measurement Converter - Anthony Cowie Ltd

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