101

1 · Choose your colour

Lift & lowerUpOpen & closeOpen

Visual representation only. Actual fabric colours vary by screen.

25mm aluminium venetian blinds in cream on a corner window with sunlight stripes on the wall

Grey aluminium venetian blinds across tall office windows above desks

Light grey aluminium venetian blind on a window with a timber sill and garden view

Made to measure · Free delivery SA-wide

25mm Aluminium Venetian Blinds

Name: Custom 25mm Aluminium Venetian Blinds, Made to Order
Brand: Custom Blinds
SKU: venetian-25mm-aluminium
Price: 550 ZAR
Availability: InStock

Steam in the bathroom, splashes in the kitchen, a small window. Aluminium slats handle damp, and a twist of the wand sets the light.

From R550 at 600 × 600mm, incl. VAT & delivery

You pay for aluminium slats made to your millimetre, in four finishes (plain, perforated, hammer, brushed), with free delivery and a 3-year warranty.

Moisture resistanceEasy cleaningLight controlCompact fitMoisture resistant

Material 25mm aluminium slats
Fitting Standard bracket

Made in 5–7 working days + courier · Free delivery · 3-Year Manufacturer's Warranty · Custom Fit Guarantee

In the box: brackets. Screws and wall plugs are included with the Complete kit, the checkout default.

Size and price

A 1200 × 1500mm window is R957

2Mount type Not sure?

Inside mountRecessOutside mountFace fix · most popularNo drill+R65 kit

Face fix: add 100mm on each side and 100mm above and below. No deduction applies. Enter the full blind size, brackets included.

Very limited stock. White no-drill tension brackets grip inside your window frame with no drilling (the brackets are white; choose any slat colour). Up to 1500mm wide. How no-drill works →

✓ 10mm deduction will be applied for a perfect recess fit.

Cancel the 10mm deduction, make this blind to my exact size

⚠ Making to your exact measurements. Your blind will be made exactly as entered. Ensure you've already allowed 5 to 10mm clearance so it sits comfortably inside the recess.

4Control side

Which side do you want the cord? Stand facing your window, left or right?

Left sideRight side

More optionsNotes

Notes (optional, e.g. "bedroom left panel")

Width (mm)Drop / height (mm)

Face fix: opening + 100mm each side, above and below.How to measure

Best guess is fine. Free tape measure. We make only after you confirm. Too big? Free trim where possible. Too small? Reduced-price remake.

FinishColour Large swatches ↓

Quantity

Secure payment

Card or instant EFTVAT and delivery included

Du Plessis & Goodyear Family TrustApril 2026

Recent changed over from another service provider, WOW, Custom Blinds really impressed! From ordering on their website, sending samples to me via courier, even 500km apart did not stop them from delivering exceptional client service! I ordered both the 25mm and 50mm aluminium blinds, both at exceptional quality and super easy to install!

4.8 Google ratingVerified by Trustindex

Colours (35 in stock, 3 awaiting stock)

101
101N
101POut of stock · due End Nov 2026
127N
167
2030
401N
408N
411N
412
4425
533N
789
789P
812N
812P
821N
8230
901N
902POut of stock · due Mid Jan 2027
905N
906N
907N
9082
909N
913N
9179
9271
937NOut of stock · due Mid Nov 2026
956N
AL1601
AL415
AL716
C202
C602
C603
C605
S468

Choose your colour on the picture at the top. Screen colours vary.

Why choose these

Won't swell or warp in a steamy bathroom
Wipe clean in a kitchen
Tilt for light without losing privacy
Slim 25mm slats suit small and shallow windows

Fitting

How it fits, step by step.

How to measure for blinds in 48 seconds: recess fit, face fix, and what to do if you are not sure.

Questions answered

Who is the best place to buy 25mm aluminium venetian blinds online in South Africa?

Choose a maker with long experience and a fit guarantee. Custom Blinds Shutters & Awnings was founded in Knysna in 2010 by Duncan Kane and has completed over 10,000 installations. Your 25mm aluminium venetian blinds are made to your millimetre, checked before they are made and delivered free across South Africa, with our Custom Fit Guarantee.

Are 25mm aluminium venetian blinds a good choice at the coast?

Yes, with one tip: in damp or salty air choose a plain colour. Aluminium does not swell or warp in humidity, which is why we suggest it for bathrooms and kitchens.

What is the difference between 25mm and 50mm venetian slats?

The number is the slat depth, not its thickness. 25mm has more, narrower slats and suits smaller windows; 50mm has fewer, wider slats and a bolder look on large windows.

Who should not buy a 25mm aluminium venetian blind?

Want a warm wood look? Choose Aluwood or Plaswood. Want a dark bedroom? Choose a blockout roller; slats always let some light through.

What if I measure wrong?

Our team checks every order before it is made. If your blind arrives too big, we trim it free; too small, we remake it at a reduced price. Claim within 48 hours of delivery under the Custom Fit Guarantee.

How should I measure the opening for these blinds?

For a recess fit, measure three widths and three drops; give us the smallest width and the longest drop. We deduct 10 mm from the width only (10 mm in total). Do not deduct anything yourself. For a face fix, add 100 mm on each side and 100 mm above and below. No deduction applies. Read the measuring guide before ordering.

What's the best way to choose blinds for a whole house?

From a full sample book, not off-cuts. Custom Blinds Shutters & Awnings sends one on request with orders over R8,000. If nothing suits, you get a full refund with no fees.

The details

What is a 25mm aluminium venetian blind?

Slim 25mm aluminium slats that tilt with a wand to set light and privacy, and lift clear of the glass with a cord.
Aluminium does not swell or warp in humidity, so it suits bathrooms and kitchens.
Available in 38 colours in plain, perforated, hammer and brushed finishes.
Made to measure up to 3000mm wide, from R550 per blind with free delivery.

Every order is checked by our team before it is made.

How do 25mm aluminium venetian blinds work?

Turn the tilt wand to angle the slats, from open to closed, for light and privacy. Pull the lift cord to raise the whole blind clear of the glass. Fit it inside the frame or over the frame.

Which 25mm aluminium venetian finish should I choose?

Choose from 38 colours in plain, perforated, hammer and brushed finishes.

25mm aluminium venetian blinds compared with other venetians

50mm slats are wider, with a bolder look on large windows. Aluwood and Plaswood give a wood look; Plaswood also handles damp rooms. Real wood suits dry rooms.