21 US creates an impact through its stunning linear structure that emerges from the mural in an arresting 3D effect. Bold and hypnotic, this black and red geometric cube wallpaper mural showcases artist Tim Muddiman’s signature hard edge contemporary abstract style. His clever use of colour and shade emphasise the structural elements resulting in a mural that is perfect for a contemporary bedroom or dining room feature wall.
High quality print & excellent colour accuracy. Easy installation with a step by step guide.
At Feathr, we create beautifully crafted wallpapers that help spaces feel considered and truly lived in. We print to order using responsibly sourced, planet-friendly materials – reducing waste while delivering exceptional quality. Every order is carefully checked before it leaves us, so you can specify with confidence.
Measuring your wall
Simply measure the maximum width and height of your wall. For more complex spaces, our measuring guide offers clear, expert support.
Wall murals
Our murals are made to measure and printed in numbered panels that align seamlessly into one complete design. Select Customise & buy to preview your mural at scale. For fully bespoke adjustments, our complimentary design service is available on request.
Repeat pattern wallpaper
Repeat designs are supplied by wallpaper rolls. Use the on-page calculator to determine quantities.
Installation
Our installation guides are designed to make the process clear and simple. Step-by-step instructions are included with every order and available here, supporting a precise, professional finish.
Enjoy free, fast worldwide shipping, with delivery in 5–10 days.
Love a design but need a few changes? Our Design Team can modify existing wallpaper designs by adjusting colours, layout, scale, or adding personal details.
How it works: Fill in the request form here with your wall dimensions and details. We review requests within 1–2 working days and contact you if we need more information.
A versatile, matt-finish wallpaper with a smooth, breathable surface. Durable yet lightweight, it’s easy to install with traditional paste-the-wall application, making it ideal for both residential and commercial spaces.
Well suited to:
Interior upgrades throughout the home
Professional or DIY installation with minimal effort
Projects seeking a balance of quality, value, and environmental care
Please note, freshly painted or plastered walls need to dry completely before installation.
Recycled
A refined choice for those prioritising sustainability without compromise. With a subtle canvas texture, this midweight wallpaper is FSC-certified, PVC-free, and compliant with leading environmental and safety standards.
This removable wallpaper offers a clean, adhesive backing that installs without paste. Ideal for smooth surfaces, it’s simple to apply and easy to remove, making it a practical solution for temporary or flexible spaces.
Well suited to:
Rental homes or temporary installations
Occasional redecoration without long-term commitment
Clean, modern interiors where minimal disruption is key
Heavy Vinyl
A heavyweight, embossed wallpaper designed for high-traffic and high-humidity areas. Durable, washable, and contract-grade, it brings both performance and texture to kitchens, bathrooms and commercial environments.
Well suited to:
Kitchens, bathrooms, and utility spaces
Hospitality and public interiors requiring extra resilience
Specifications requiring antibacterial or highly cleanable surfaces
Enter your wall dimensions and drag the box to select your preferred area.
Choose your mural size
Enter your wall dimensions (add 5-10cm / 2-3 inches) width and height
Drag the box to select your preferred area
Request custom changes
Need to adjust a wallpaper to perfectly suit your project?
We offer free customisation services, including:
Moving, adding, or removing a subject
Changing colors
Adding a name or personal touch
Adjusting the scale of a pattern
We’ll always do our best to help, so feel free to ask. We'll get back to you within 1-2 days.
21 US
Colour: Black wallpaper
Units
Wall dimensions
cm
cm
ftin
ftin
Material Type
Flip Image
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With you in 5-10 Days
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How to measure your wall
Measuring your walls correctly helps ensure a perfect fit for your new wallpaper.
Tip: We recommend adding 5–10 cm (2–4 inches) to both the height and width. This allows flexibility during installation.
Standard wall
Measure the full height and width of the wall you want to cover. It’s always a good idea to measure more than once to make sure your numbers are correct. Only include the area that will be covered by wallpaper, and do not include skirting boards or coving.
Multiple walls
If your wallpaper will continue across more than one wall, measure the width of each wall and add them together. Use the total width when placing your order. There’s no need to order the wallpaper separately for each wall. We recommend that you add 10 cm / 4 inches to the overall width to ensure you’ll have some extra material for the corner.
Sloped walls
When measuring a wall with a slope, take the measurement from the longest height and the widest width of the wall, and ignore the sloped edge. Your wallpaper will be printed as a full rectangle, and the sloped section can be trimmed during installation.
Pitched walls
For walls with two slanted sides, measure the maximum height and the maximum width of the wall. We will produce your wallpaper as a rectangle, and any angled areas can be trimmed away during installation.
Walls with obstacles
If your wall includes a door, window, or other obstacle, measure the full width and height of the wall. You can cut around the obstacle during installation. If you’d like, you can send us a photo or sketch with measurements and we can provide a preview that includes the obstacles.
Staircases
For staircase walls, measure the widest point and the tallest point of the wall, ignoring the slope. Any extra material will be trimmed during installation.
