Outsunny Replacement Cushions: Sizes, Compatibility & Where to Buy

Cushions are the most replaceable — and most neglected — part of any garden furniture set. Faded, flattened or mildewed cushions make an otherwise good Outsunny set look tired, and replacing them is the fastest and cheapest way to transform an older set. This guide covers how to find the right replacement cushions for your Outsunny furniture, what to measure, and how to care for them to make them last.

When to Replace Your Cushions

Cushions don't need to be replaced at the first sign of wear. Before buying replacements, assess what's actually wrong:

Faded colour: UV fading is normal over time. If the cushion is structurally sound and the cover is removable, try washing the cover first — fading often looks worse when the fabric is dirty. If the colour is genuinely gone, a new cover is the most cost-effective fix.

Flattened filling: cushion foam compresses over time with use. If the cover is in good condition but the cushion feels flat, the foam insert can be replaced independently — standard foam sheets are available from fabric shops and online. Cut to size and insert into the existing cover.

Mildew: before replacing, try treating with a diluted white vinegar solution (1 part vinegar to 2 parts water), leave for 30 minutes, scrub gently and rinse. Dry fully in the sun. Mild mildew often comes out completely. Severe mildew that has penetrated the foam warrants replacement.

Torn or damaged covers: if the cover is torn but the foam is fine, replace the cover only. If both are damaged, replace the full cushion.

Standard Outsunny Cushion Sizes

Outsunny doesn't publish a universal cushion size guide, and sizes vary across the range. However, most Outsunny sofa and lounge cushions fall within a set of standard dimensions that are widely available as universal replacements:

Seat cushions (sofa sets and lounge chairs):

• 48cm x 48cm x 8cm — most common for mid-range corner sofa sets
• 50cm x 50cm x 8cm — common on larger sofa sets
• 55cm x 55cm x 8cm — found on some premium sets
• 60cm x 60cm x 8cm — larger lounge chairs and some corner sets

Back cushions (sofa sets):

• 48cm x 48cm x 8cm — most common
• 50cm x 50cm x 8cm — common on larger sets

Dining chair cushions:

• 40cm x 40cm x 5cm — most common for dining chairs
• 45cm x 45cm x 5cm — found on some larger dining chairs

Sun lounger cushions: these vary more significantly by model. Most Outsunny lounger cushions are 170–190cm long and 55–65cm wide. Measure your existing cushion or the lounger frame before ordering.

Swing seat cushions: highly model-specific. The seat cushion typically matches the seat width (usually 100–130cm for a 2-seater, 150–170cm for a 3-seater). Measure carefully before ordering.

How to Measure for Replacement Cushions

Always measure before ordering. Don't assume your set uses a standard size — even sets that look identical can have different cushion dimensions.

For seat and back cushions: measure the existing cushion (length x width x depth) when it's uncompressed. If the cushion is very flat, measure the seat frame instead — the cushion should be the same size as the seat platform, or up to 2cm smaller on each side to allow for the cover.

For lounger cushions: measure the full length of the lounger frame from headrest to foot, and the width of the seat platform. The cushion should match the frame length and be 2–5cm narrower than the frame width to sit neatly within the sides.

For swing seat cushions: measure the seat width and depth, and the backrest height. Swing seat cushions are often sold as a set (seat + back) — check whether you need both or just one.

Depth matters: a replacement cushion that's thinner than the original will look and feel wrong. Aim to match the original depth as closely as possible — 8cm is the standard for mid-range Outsunny sofa sets.

Compatibility: Exact Replacements vs Universal Fit

Exact Outsunny replacement cushions are available directly from Outsunny and through some retailers. To find the right ones, you'll need your model number — usually found on a label on the frame or in the original assembly instructions. Exact replacements guarantee the right fit and matching fabric, but availability varies and older models may no longer have replacements in stock.

Universal outdoor cushions in standard sizes (48x48cm, 50x50cm etc.) are widely available and often fit Outsunny frames well. The fabric won't match exactly, but if you're replacing all cushions on a set at once, a coordinating colour can look intentional rather than mismatched. Look for outdoor-rated fabric (UV-resistant, quick-drying) rather than indoor cushions, which deteriorate quickly outside.

Custom cushions are available from specialist outdoor cushion suppliers if your set uses non-standard dimensions. This is the most expensive option but guarantees a perfect fit.

Replacing Covers vs Replacing Full Cushions

If the foam insert is still in good condition but the cover is faded or damaged, replacing the cover alone is significantly cheaper than replacing the full cushion. Most Outsunny cushion covers are removable via a zip — check your set before assuming you need full replacement cushions.

Replacement covers in standard sizes are available from outdoor fabric specialists and online marketplaces. Measure the existing cover (not the foam) for the right size. Look for covers with a zip closure and outdoor-rated fabric — polyester with a water-resistant coating is the most practical choice.

Replacing covers across a full sofa set in a new colour is the cheapest way to completely refresh the look of an Outsunny set — often under £30–50 for a full corner sofa set's worth of covers.

Making Replacement Cushions Last

The single most impactful habit: bring cushions inside or store them in a weatherproof box when not in use. Even UV-resistant outdoor fabric fades faster with prolonged sun exposure, and damp cushions left outside overnight develop mildew quickly.

Routine care: brush off loose dirt before it works into the fabric. Spot-clean stains promptly with a mild detergent solution. Wash covers at 30°C at the start and end of the season.

Storage: store cushions in a breathable bag or box — not a sealed plastic bag, which traps moisture. A weatherproof garden storage box keeps cushions accessible during the season while protecting them from overnight damp.

For full care guidance, see our complete Outsunny care guide.

Further reading

• Outsunny Garden Furniture UK: The Complete Guide
• How to Care for Outsunny Garden Furniture: The Complete UK Guide
• 5 Ways to Keep Your Outsunny Patio Furniture Looking New

Frequently asked questions

What size are Outsunny replacement cushions?

Most Outsunny sofa set seat and back cushions are 48x48cm or 50x50cm x 8cm deep. Dining chair cushions are typically 40x40cm or 45x45cm x 5cm. Sun lounger and swing seat cushions vary significantly by model — always measure your existing cushion or frame before ordering.

Can I use universal outdoor cushions on Outsunny furniture?

Yes — standard outdoor cushion sizes (48x48cm, 50x50cm) often fit Outsunny frames well. The fabric won't match exactly, but replacing all cushions at once in a coordinating colour looks intentional. Always measure your existing cushions before ordering to confirm the size.

How do I find my Outsunny model number for exact replacement cushions?

The model number is usually on a label on the frame or in the original assembly instructions. It may also be on the original packaging or your order confirmation. With the model number, contact Outsunny directly or search online for exact replacement cushions.

Can I just replace the cushion covers rather than the full cushions?

Yes — if the foam insert is still in good condition, replacing the cover alone is significantly cheaper. Most Outsunny cushion covers are removable via a zip. Replacement covers in standard sizes are available from outdoor fabric specialists and online marketplaces.

How do I stop replacement cushions from fading?

Store cushions inside or in a weatherproof box when not in use — even UV-resistant fabric fades faster with prolonged sun exposure. A parasol or pergola over your seating area also significantly reduces UV exposure on cushions during use.