How to Measure Your Window

Measure inside the window reveal in millimetres. Take three width measurements and three height measurements, then enter all six into the Smart Shutter Finder.

Why three measurements? Window openings are not always perfectly square. The Finder checks the tightest points against every suitable ready-to-go option.
1

Measure inside the reveal

  • Measure the clear opening where the shutter will sit.
  • Do not measure across the outside edges of the architrave.
  • Keep every measurement in millimetres and do not round it.
MEASURE INSIDE THE REVEALArchitrave / wall faceREVEAL
2

Measure width at three points

  • Measure across the inside reveal at the top, middle and bottom.
  • Keep the tape level.
  • Record and enter all three figures—the Finder will use the tightest width.
TOPMIDDLEBOTTOMENTER ALL THREE WIDTHS
3

Measure height at three points

  • Measure from the finished bottom surface to the inside top.
  • Take measurements at the left, centre and right.
  • Record and enter all three figures—the Finder will use the tightest height.
LEFTCENTRERIGHT
4

Check the clear depth

  • Find the handle, lock, winder, mullion or storm bar closest to the front of the opening.
  • Measure from that obstruction to the front edge of the reveal.
  • Aim for 55mm of clear space so the shutter blades can rotate.
55mm CLEAR DEPTHGlassHandle / lockFront edgeCLEAR BLADE SPACE
5

Measure the midrail position (if required)

  • If the window has a horizontal storm/support bar, measure from the bottom sill (the base of the window reveal) to the centre of the storm/support bar.
  • If the window is direct to the floor, measure from the finished floor to the centre of the storm/support bar.
  • Up to 1500mm high: a midrail is generally not required. Over 1500–1750mm: it may be optional. Over 1750mm: it is required.
  • A storm/support bar can determine the appropriate midrail position regardless of the overall height.
MIDRAIL HEIGHT CENTRE OF STORM / SUPPORT BAR BOTTOM SILL / BASE OF WINDOW REVEAL
6

Check space for the 19mm Small Z Frame lip

The ready-to-go Small Z Frame has a 19mm lip around the face of the opening. Check the architrave, wall, sill, benchtop, tiles and cupboards around all four sides.

Clear surround

The standard 19mm lip can sit on the face around all four sides.

Direct to benchtop

The bottom lip may need to be removed or altered so the frame can sit flat.

Hard against a wall

The side lip may need to be removed or altered on the affected edge.

Minor frame alterations can be completed on site if you’re confident doing so. Prefer us to take care of it? Instant Shutters Direct can complete the required alterations for you, with a typical 2–3 day turnaround. Send us a photo or contact us today to discuss your window.
Before entering your measurements Confirm all six opening measurements, clear depth, any storm-bar height, and the space available for the 19mm frame lip.

Got your measurements?

Enter your window measurements and let our Smart Shutter Finder check every ready-to-go range to show you the suitable options.

I’VE GOT MY MEASUREMENTS - FIND MY SHUTTER