Measuring Guide

Select a Measuring Guide

Please select from one of the below guides that suits your intended application.


PLEASE NOTE: This guide is only intended for use with our range of acoustic curtains with a Rufflette Tape and Hook heading, matched with a Silent Gliss 1280 or 3840 curtain track system.


The page is currently being updated to provide measuring guidelines for all curtain types but in the meantime, please contact us if you require assistance.



1. Windows

a) Curtains fitted within window recess

Where curtains are to be fitted within the window recess, you only need the width and height of the recess to determine the correct curtain and track dimensions.

Window Recess Curtain Dimensions

Track Length

  • Measure the width of the window recess.
  • This will be the track length required.

Curtain Size

  • Take the measurement of the curtain track.
  • Add an approx. 3% onto the width taken, to allow for easement. (E.g. 120cm x 1.03 = 123.6cm).
    If a pair or multiple curtains are required, divide the width by the number required and then add 3% to each curtain.
  • Measure the height of the window recess.
  • Round the width and height to the nearest centimeter. (E.g. 123.2cm = 123cm).
  • You have your final curtain dimensions.


b) Curtains fitted to wall above a window

Where curtains overlap the window recess, allowances must be made for stacking space and track fixing to determine the correct curtain and track dimensions.

Wall Above Window Curtain Dimensions

Track Length

  • Measure the width of the window.
  • Add an approx. 10-15% additional width to each side for stacking space/overlap. Labelled 'A'.
  • This will be the track length required.

Curtain Size

  • Take the measurement of the curtain track.
  • Add an approx. 3% onto the width taken, to allow for easement. (E.g. 120cm x 1.03 = 123.6cm).
    If a pair or multiple curtains are required, divide the width by the number required and then add 3% to each curtain.
  • Measure the height of the window.
  • Add an allowance for track fixing on the wall above the window, labelled 'B'.
    We recommend the allowance at 'B' should be a minimum of 10cm.
  • Add an allowance for a sill overhang, labelled 'C'.
    This is a matter of personal preference and may be dictated by other constraining factors, such as radiator positions. For acoustic purposes we recommend 20cm as a minimum. If the curtain is dropping to floor level then this does not apply, simply measure to the floor level.
  • Round the width and height to the nearest centimeter. (E.g. 123.6cm = 124cm).
  • You have your final curtain dimensions.


c) Curtains fitted to ceiling above a window

Where curtains overlap the window recess and need to be ceiling fixed, allowances must be made for stacking space and track fixing to determine the correct curtain and track dimensions.

Ceiling Above Window Curtain Dimensions

Track Length

  • Measure the width of the window.
  • Add an approx. 10-15% additional width to each side for stacking space/overlap. Labelled 'A'.
  • This will be the track length required.

Curtain Size

  • Take the measurement of the curtain track.
  • Add an approx. 3% onto the width taken, to allow for easement. (E.g. 120cm x 1.03 = 123.6cm).
    If a pair or multiple curtains are required, divide the width by the number required and then add 3% to each curtain.
  • Measure the height from the bottom of the window to ceiling.
  • Add an allowance for a sill overhang, labelled 'C'.
    This is a matter of personal preference and may be dictated by other constraining factors, such as radiator positions. For acoustic purposes we recommend 20cm as a minimum. If the curtain is dropping to floor level then this does not apply, simply measure to the floor level.
  • Round the width and height to the nearest centimeter. (E.g. 123.6cm = 124cm).
  • You have your final curtain dimensions.



2. Doors

a) Curtains fitted within door recess

Where curtains are to be fitted within a door recess or doorway, you only need the width and height of the recess to determine the correct curtain and track dimensions.

Curtains fitted within a door recess

Track Length

  • Measure the width of the door recess or doorway.
  • This will be the track length required.

Curtain Size

  • Take the measurement of the curtain track.
  • Add an approx. 3% onto the width taken, to allow for easement. (E.g. 120cm x 1.03 = 123.6cm).
    If a pair or multiple curtains are required, divide the width by the number required and then add 3% to each curtain.
  • Measure the height of the door recess or doorway.
  • Round the width and height to the nearest centimeter. (E.g. 123.2cm = 123cm).
  • You have your final curtain dimensions.


b) Curtains fitted to wall above door

Where curtains overlap the door or doorway, allowances must be made for stacking space and track fixing to determine the correct curtain and track dimensions.

Curtains fitted to wall above door

Track Length

  • Measure the width of the door or doorway.
  • Add an approx. 10-15% additional width to each side for stacking space/overlap. Labelled 'A'.
  • This will be the track length required.

Curtain Size

  • Take the measurement of the curtain track.
  • Add an approx. 3% onto the width taken, to allow for easement. (E.g. 120cm x 1.03 = 123.6cm).
    If a pair or multiple curtains are required, divide the width by the number required and then add 3% to each curtain.
  • Measure the height of the door recess or doorway.
  • Round the width and height to the nearest centimeter. (E.g. 123.2cm = 123cm).
  • You have your final curtain dimensions.