Square Outdoor Cushions — Custom Size & Weather-Resistant Fabric

Standard outdoor cushions come in a fixed set of rectangular sizes. If your patio furniture is square, you end up trimming a too-long cushion, stuffing a too-short one, or leaving the seat bare because nothing fits.

USCUSHION cuts every square outdoor cushion to the exact dimensions you enter at checkout. You choose the width, depth, thickness, foam density, and fabric. We cut, wrap, and ship it directly to you.

Why customers choose us:

• Exact square cutting: Enter your furniture's actual dimensions and receive a cushion that sits flush on all four sides with no trimming or repositioning needed.
• Seat and back set available: Order a matching square back cushion in the same outdoor fabric for furniture that needs both pieces.
• Weather-rated materials throughout: Both the foam core and the fabric cover are selected for outdoor durability, not repurposed indoor cushion materials.
• Fits ottomans, chairs, benches, and sectionals: One configurator handles any square outdoor furniture piece, from a small garden stool to a large modular corner seat.
• Removable YKK zipper covers: Covers unzip for washing at the end of the season, extending the life of your square outdoor cushions through multiple years of use.

Square outdoor cushions fit a wider range of furniture than most people expect. From square ottomans and cube chairs to symmetrical bench seats and sectional corner pieces, a properly sized square cushion sits flush on all four sides without overhang or gaps. These cushions are cut to your exact dimensions, so whether your furniture is 18 inches square or 26 inches square, the fit is precise.

Perfect for:

• Square patio chair cushions for cube-style lounge chairs and modular outdoor seating
• Outdoor ottomans that double as extra seating, where a thick square cushion adds comfort and protection
• Square bench seats on decks and patios where a rectangular cushion would leave corners bare
• Sectional corner pieces that require a square seat pad to complete the set
• Garden stools and concrete cube seats that need a weather-resistant top cushion
• Replacement cushions for square patio furniture where the original pad has worn out

Every order can include a matching square back cushion in the same fabric and thickness, so your seat and back form a complete outdoor set.

Square outdoor cushions sit exposed to sun, rain, and humidity, so the fabric needs to hold up through full seasons of outdoor use without fading, growing mildew, or losing its shape. Our outdoor fabric range includes solution-dyed performance weaves and marine-grade options rated for extended outdoor exposure.

All fabrics are:

• UV-resistant and solution-dyed so color stays consistent through seasons of direct sun
• Weather-resistant and quick-drying so square patio cushions can stay outside through light rain
• Mold and mildew resistant, which matters for cushions sitting on stone, wood, or metal frames in humid conditions
• Available in Sunbrella-style acrylic weaves and marine-grade vinyl for poolside and boat applications
• Sewn with YKK zippers on removable covers for end-of-season washing or easy replacement

Solution-dyed acrylic is the most popular choice for patio and deck use. For poolside ottomans and cube chairs that get splashed regularly, marine-grade vinyl is the more durable option.