Why Cushion Size Matters
The right cushion size can make a sofa feel considered and complete — the wrong size can make even a beautiful cushion look out of place. This guide offers sizing guidance to help you find the best fit for your sofa and style.
Common Cushion Sizes and Where They Work
As a general guide, these are the most common cushion sizes and the settings they tend to suit best:
- 40x40cm (16") — A versatile size that works well as an accent cushion on sofas and as a primary cushion on beds or armchairs. Ideal for layering.
- 45x45cm (18") — Another popular sofa cushion size in the UK. Fills a sofa seat comfortably without overwhelming the frame.
- 50x50cm (20") — A generous size suited to larger sofas and floor seating. Makes a strong visual statement.
- Rectangular (e.g. 30x50cm or 40x60cm) — Lumber or Bolster-style cushions that mix well with square cushions for a layered look.
Note: These are general guidelines. The 'right' size is ultimately a matter of your sofa's proportions, your preferred aesthetic, and how many cushions you plan to use.
How Many Cushions for Different Sofa Layouts?
Here's a practical starting point based on common sofa sizes — these are suggestions, not rules:
- 2-seater sofa: 2–4 cushions. Two larger cushions (45x45cm) work well, or four 40x40cm covers for a layered feel.
- 3-seater sofa: 4–6 cushions. A mix of sizes — for example, two 50x50cm at the ends and two to three 40x40cm in between — creates balance without crowding.
- Corner sofa / L-shape: 6–10 cushions. The larger surface rewards more cushions, and layering different sizes and textures adds visual depth.
- Armchair: 1–2 cushions. One 40x40cm cushion is often all you need.
Odd numbers can look more relaxed and organic; even numbers tend to feel more structured and formal — choose what suits your style.
Do 40x40cm Cushion Covers Work on Sofas?
Yes — 40x40cm covers are very versatile. They work best as accent pieces within a larger arrangement on a sofa, or as the primary cushion on an armchair. On a bed, they sit neatly against larger pillows as decorative layering.
If 40x40cm will be your only cushion size on a larger sofa, consider going up to 45x45cm for more visual weight. But as part of a mixed arrangement, 40x40cm covers are a great choice.
Our 40x40cm Cushion Covers
If you're looking for a refined 40x40cm cover to add to your sofa or bed, here are two from our current collection:
Alpine Forest Orla Kiely Cushion Cover — 40x40cm
A nature-inspired print from the iconic Orla Kiely archive. The Alpine Forest design brings depth and colour to neutral sofas or layered bedroom arrangements. Crafted for everyday luxury.
Orla Kiely Large Stem Classic Jacquard Cushion Cover — 40x40cm
The Large Stem pattern is one of Orla Kiely's most enduring designs, here realised in a classic jacquard weave. Textured, tactile, and equally at home on a sofa or a bed.
Final Thoughts
There's no single correct answer when it comes to cushion sizing — it depends on your sofa, your style, and how you like to arrange things. Use this as a starting point, trust your eye, and don't be afraid to mix sizes for a more considered, layered look. Throw in striking colours to change the room mood by month, season or just fancy a change. This low cost option works every time
Browse our full range of cushion covers to find the right fit for your home.