Cushion Sizes UK – Quick Guide to the Right Fit

Choosing a cushion that fits your sofa or chair is easier than you think. Most UK homes use a handful of standard sizes, so you can shop with confidence. Below you’ll get the key numbers, a simple way to measure, and a few tips to avoid common mistakes.

Standard Cushion Dimensions

Here are the most common cushion sizes you’ll see in UK stores:

• Square cushions: 40 cm, 50 cm, 55 cm, 60 cm, 70 cm.
• Rectangular cushions (seat pillows): 45 × 60 cm, 55 × 80 cm, 60 × 90 cm.
• Back cushions: 50 × 70 cm, 60 × 80 cm.
• Floor cushions: 70 × 110 cm, 80 × 120 cm.

Those numbers cover most sofas, armchairs, and lounge chairs. If you’re buying a set, the pieces usually match the listed sizes.

How to Choose the Right Size

First, measure the slot or pocket where the cushion will sit. Use a tape measure and note the width and depth. Add a centimetre or two if you like a looser fit.

Second, think about how you use the furniture. If you lean back a lot, a deeper cushion (60 cm or more) feels more comfortable. For a sleek look, stick to the smaller square sizes.

Third, match the cushion height to the seat height. A cushion that’s too thick will raise you too high, while a thin one may feel flat. Most sofas have a seat depth of 55‑60 cm, so a 10‑15 cm cushion height works well.

Finally, consider the cover fabric. Thicker fabrics can add a couple of centimetres to the overall size, so factor that in if you’re tight on space.

When you buy online, check the product description for exact measurements. If the numbers aren’t listed, contact the seller – most will give you the details.

Mixing sizes can look great, but keep a balance. Two matching squares with a larger rectangle in the middle creates a classic arrangement. If you’re unsure, start with a standard 50 cm square and see how it feels.

In short, measure, match the depth, and pick a height that feels right. With these basics you’ll end up with cushions that look good and feel comfortable every day.