Window Blinds South Africa: How to Measure PerfectlyMay 6, 2026

Blackout Roller Blinds for sale in South Africa

How to Measure Your Windowsfor Perfect-Fit Blinds

Window blinds play such an important role when it comes to making a house feel like a home, and yet the secret to getting that polished finish begins long before installation.

It starts with getting the measuring just right.

For homeowners exploring window blinds in South Africa, one small miscalculation can lead to awkward gaps or an ill-fitting window blind that just looks untidy.

The good news is that with a little care and a few insider techniques, measuring becomes a simple and even fun part of the process.

What are standardwindow measurements for blinds?

Standard window sizes do exist, though they vary more than you expect.

In South Africa, common widths for ready-made blinds typically range between 600 mm and 1800 mm, with drop lengths from 1000 mm to 2200 mm.

However, relying purely on standard sizing is not something everyone can do.

Many modern homeowners tend to prefer custom finishes that align with their interior aesthetic goals rather than having to adjust their space to fit pre-made options.

This is why accurate, personalised measurements are so important to know how to get right, because even in homes with seemingly uniform windows, small differences in plastering or framing can affect the final fit.

What is the correct wayto measure for blinds?

Measuring for blinds is less complicated than it seems, though it does require attention to detail.

First, you must decide between an inside mount and an outside mount. 

An inside mount sits neatly within the window recess, creating a cleaner, neater look, while an outside mount can make windows look larger, and it can allow for more light control.

For an inside mount, you should measure the width at the top, middle, and bottom of the window. It can help to use the smallest measurement to ensure the blind fits comfortably within the recess. For the height, measure from top to sill in three places and use the longest measurement.

For an outside mount, measure the desired coverage area rather than the window itself. And by adding an extra 50 to 100 mm on each side, you can create better light blocking and an overall softer visual finish.

Using a steel measuring tape rather than a fabric one ensures accuracy. Even a few millimetres can make a noticeable difference once the blinds are installed.

What sizes doready-made blinds come in?

Ready-made blinds remain a practical choice for many households. 

They are typically available in fixed increments, such as 600 mm, 900 mm, 1200 mm, and 1500 mm widths, with corresponding drop lengths.

While convenient, these sizes may not always align perfectly with existing windows, and this can result in slight gaps or the need for adjustments during installation (which is why working with professional installers is so important).

Companies like Manley Blinds focus on precision, ensuring that each blind looks as though it belongs exactly where it is placed.

Small detailsthat make a big difference

Aside from the basic measurements, a few other thoughtful considerations can refine the final result.

You should check for obstructions such as window handles or burglar bars, as these can affect how the blind sits, and you can also consider how much light control is desired, especially in bedrooms or living areas where glare may be an issue.

It is also worth noting that natural light in South Africa can be quite strong throughout the year, and the consistently high sunlight hours across many regions make well-fitted blinds an essential part of indoor comfort.

And going with the right material, whether it is blockout, sheer, or textured fabric, adds another layer of intention to the space.

Bringing it all together

There is something luxurious about a home that feels thoughtfully finished  that many of us take for granted. 

Perfectly fitted blinds can give a space an atmosphere, and create a sense of calm.

For those looking at buying window blinds in South Africa, taking the time to measure properly is the right place to start.

Frequesntly Asked Questions

How do you measure windows for blinds in South Africa?

Measure the width and height in three places and use the most accurate figures depending on whether you choose an inside or outside mount.

Are custom blinds better than ready-made blinds?

Custom blinds provide a more precise fit and a refined finish, while ready-made options are convenient but may not fit perfectly.

What are standard blind sizes in South Africa?

Common widths range from 600 mm to 1800 mm, with various drop lengths, though sizes can vary by supplier.

Can I install blinds myself after measuring?

Yes, many blinds can be installed at home, but accurate measurements are essential to ensure a proper fit.

What type of blinds are best for South African homes?

Blockout and light filtering blinds are popular due to the strong natural sunlight, helping control light and maintain indoor comfort.