The Complete Velux Roof Window Size Guide For Bloc Blinds: Find Your Perfect Fit
What Are Velux Window Codes?
Velux window codes (like UK08, U04, or MK06) refer to the specific dimensions and models of Velux roof windows. These codes are usually printed on a plate attached to the top of the window sash (open the window and check the top edge).
Each code ensures you get the exact fit when ordering Bloc blinds, preventing light leaks or awkward overlaps.
Bloc Blinds for Velux Windows: Available Sizes on Tomorrow.ie
UK08 & U08 Sizes – Bestsellers for Larger Roof Windows
If you have a UK08 or U08 Velux window, you’re in luck. These are some of our most popular sizes and come in a full color range.
Available Colours:
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White
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Black
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Navy
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Cream
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Dark Grey
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Night Sky
Frame Options:
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White Frame
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Silver Frame
These options are perfect for bedrooms or home offices where blackout performance is essential. U08 and UK08 are often found in newer loft conversions.
M06, M04 & MK06 – Medium Skylight Windows
These mid-sized windows are common across modern homes, making them one of the most versatile blind sizes.
Available in:
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White
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Black
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Cream
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Dark Grey
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Navy
-
Night Sky
Frame Finishes:
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White Frame
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Silver Frame
MK06 is especially popular in attic bathrooms or landings, where privacy + light control matter.
U04 & MK04 – Great for Bedrooms & Nurseries
U04 and MK04 are ideal for medium-sized Velux windows, often placed in bedrooms. Bloc blackout blinds in these sizes help create a total blackout environment, ideal for improving sleep.
Available Colours:
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White
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Cream
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Navy
-
Dark Grey
-
Black
Frame Finishes:
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White Frame
- Silver Frame
SK06, S06 – Tall Velux Windows
If you have SK06 or S06 Velux roof windows, these are generally taller window models that let in more vertical light. The perfect fit Bloc blinds will give you full coverage, without gaps.
Colours Available for SK06 & S06:
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Black
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White
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Navy
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Dark Grey
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Cream
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Night Sky
Frame Options:
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Silver or White
C04, C02, 206, 102 – Compact Roof Windows
Smaller windows don’t mean less impact. These sizes are ideal for tight spaces like loft bathrooms, stairwells, or home offices.
Bloc Blind Options Available:
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White
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Dark Grey
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Navy
-
Black
-
Night Sky
Frame Colours:
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White or Silver Frame
These sizes deliver the same blackout performance in a compact format.
PK10, PK08 – For Longer, Narrow Skylight Windows
These models are longer vertically, often used in modern roofline architecture or dual window designs.
Available Shades:
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Cream
-
White
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Navy
-
Dark Grey
-
Night Sky
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Black
Frame Options:
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White or Silver
How to Find Your Velux Window Size Code
Not sure which Velux window code you have? Here's how to check in 3 easy steps:
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Open your roof window fully.
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Look at the top edge of the sash frame (you may need a stool or step ladder).
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Find a small metal or plastic plate, it’ll show a code like “GGL MK06” or “GGU UK08”.
This code tells you the exact size and type of your Velux window. Just match this with the correct Bloc blind size on Tomorrow.ie.
Bloc Blinds: Why They’re Perfect for Velux Skylights
Here’s why thousands choose Bloc blackout blinds for their Velux windows:
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100% blackout design with precision fit
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Thermal insulation helps reduce energy bills
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Quick and easy to install – no professional needed
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Stylish colour range to match any interior
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Durable frames (white or silver) that complement your window
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Trusted by homeowners across Ireland & the UK
Conclusion: Your Perfect Bloc Blind Fit Starts With the Right Velux Size
Getting the perfect Bloc blind isn’t about guessing, it’s about matching the right Velux code with a style you love. If you got a UK08 in the bedroom or a PK08 in the attic, Tomorrow.ie makes it easy to find blackout blinds that fit like they were made for it (because they are).
Need help picking the right one? Our customer service team is just an email away, or browse the full Bloc Blinds for Velux Collection now.