18" x 18" Size Cushions & Covers

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Our 18" x 18" cushion covers collection brings together every design we stock in this popular standard size — one of the most widely used cushion dimensions in the UK, and the easiest size to find in the widest range of styles.

An 18 inch square is one of the most popular cushion sizes in the UK, suiting most sofas, armchairs, and beds. It is a great starting point when building a cushion arrangement — flexible enough to work as a primary size or as a middle layer alongside larger or smaller covers. Use a pad of the same size or one inch larger for a plump result.

Frequently Asked Questions

What makes 18" x 18" the most popular cushion size?

It suits most standard sofas, armchairs, and beds and is available in the widest range of designs — making it the most versatile starting point for any cushion arrangement.

Do the covers come with inner pads?

Most are sold as covers only.

What inner pad should I use with an 18" cover?

An 18 inch pad or one inch larger gives the best plump, well-filled finish.

What styles are available?

The widest range of our designs are available in this size — browse for current options.

Is 18 x 18 a good size for an armchair?

Yes, it suits most standard armchairs well as a single accent cushion or in pairs.

Are these covers machine washable?

Check the care label on each product as instructions vary.

What fabrics are available?

Cotton, polyester, polycotton, velvet, and more — check individual descriptions.

How many 18 inch cushions on a three-seater sofa?

Three to five cushions is the most common arrangement — mix with other sizes or textures for the most natural look.

18" x 18" Cushion Covers

An 18 inch square is one of the most popular cushion sizes in the UK, and our collection in this dimension reflects that with the widest range of designs, colours, patterns, and fabric types available in this size. Whether you are looking for a simple plain cover, a velvet design, a bold pattern, or something more subtle and textured, you will find it all here without needing to navigate around other sizes. This is a genuinely versatile size that suits most sofas, armchairs, and beds across a wide range of interior styles.

The 18 inch square is a great starting point if you are building a cushion arrangement from scratch, as it gives you flexibility to add larger or smaller covers around it for a layered look. Our plain and solid cushion covers range has a wide selection in this size for use as a neutral base, and our velvet cushion covers collection has popular velvet designs in 18 inch that are among our best-selling individual styles. Our ready filled cushions collection also has pad-included options in a similar size if you want a complete, ready-to-use cushion.

Why Shop by Size?

Everything in One Place: Every 18 inch square design we stock, all together without searching.
Most Popular UK Size: The widest range of designs, colours, and fabrics available in this dimension.
Versatile Starting Point: A great base size when building a mixed cushion arrangement for a sofa or bed.
Suits Every Room: Works on sofas, armchairs, beds, and chairs across all interior styles.

Browse the full 18" x 18" cushion covers range and find the right designs for your space.