Custom Deep Seat Cushions — Seat & Back Pillow Set, Indoor Outdoor

Deep seat patio chairs are built for comfort, but the cushions that come with them rarely last. The seat foam compresses flat after two seasons, the back pillow loses its shape, and replacement sets from the furniture brand are discontinued within a few years — leaving a solid frame with nothing that fits it.

At uscushion.com, you measure the seat and back pillow independently and submit both sets of dimensions. The seat cushion and knife-edge back pillow are cut and sewn to your exact specifications as a matched set, in the same fabric and color across both pieces.

Why customers choose us:

• Seat and back sized independently: Most deep seat cushion sets fix the back pillow dimensions to the seat width. Here, seat depth, seat width, back pillow height, and back pillow width are all entered separately — so both pieces fit the actual frame, not an approximation
• Knife-edge back pillow construction: The back pillow is sewn flat on both faces with no side boxing strip, giving deep seat patio cushions a clean, tailored profile that works equally well in outdoor lounge chairs and indoor reading chairs
• Matched set from one order: Seat cushion and back pillow ship together, cut from the same fabric run, so color, texture, and finish stay consistent across the full set without mixing dye lots
• Foam matched to the environment: Outdoor deep seat cushions use high-density foam with a moisture-resistant wrap to hold shape through a full outdoor season; indoor deep seating uses high-resilience upholstery foam suited to extended daily sitting
• YKK zipper cover on the seat cushion: The seat cover removes for washing without tools and returns without a fight — the back pillow cover is also fully removable for the same reason

Deep seat patio furniture has a seat depth of 20 to 24 inches — far beyond what standard cushions cover. Most replacement sets either run short on the seat, use a back pillow that does not match the chair width, or ship as a fixed-size set that does not fit the actual frame. This custom deep seat cushion set solves all three: seat and back pillow are sized independently to your exact measurements, so both pieces fit the frame they were made for.

Perfect for:

• Outdoor deep seat patio cushions for club chairs, sectionals, and lounge chairs where the seat depth exceeds 20 inches and standard sizes fall short
• Deep seating replacement cushions for outdoor furniture where the original set has faded, flattened, or been discontinued by the manufacturer
• Deep seat cushions for patio conversation sets where every chair in the group needs a matched replacement cut to the same dimensions
• Indoor deep seat lounge chairs and reading chairs where a knife-edge back pillow in velvet or linen-look fabric suits the room better than a flat back cushion
• Covered porch and sunroom deep seating where cushions deep seating frames need mildew-resistant fabric without sacrificing the softer look of an indoor-style knife-edge pillow
• Oversized or custom-built outdoor furniture where no standard deep seat outdoor cushions exist in the right width, depth, or back height

Each set includes one seat cushion and one knife-edge back pillow, sized independently from your measurements. For standard flat-back outdoor seat cushions without a pillow back, see our custom seat cushion pad for a single-piece option.

Deep seat outdoor cushions live in full sun and rain for months at a time, while indoor deep seating calls for softer upholstery fabrics that hold up to daily use in a living room or sunroom. Both environments are covered in the same ordering process — fabric choice is what changes.

All fabrics are:

• Available in outdoor performance grades for patio and deep seating replacement cushions for outdoor furniture — solution-dyed polyester and performance canvas resist UV fading, moisture, and mildew through a full outdoor season without losing color or structure
• Available in indoor upholstery grades for living room and sunroom deep seat lounge chairs — velvet, linen-look weaves, and soft upholstery fabric in the same custom dimensions as the outdoor options
• Applied consistently across both seat cushion and knife-edge back pillow — both pieces are cut from the same fabric so color and texture stay matched across the full set
• Removable via YKK zipper cover on the seat cushion — the cover comes off for washing and returns cleanly without replacing the foam
• Available in a wide color and pattern range to coordinate with existing patio furniture sets or indoor room palettes

For full-sun patio deep seating, solution-dyed performance fabric is the reliable default — the dye runs through the fiber rather than sitting on the surface, so UV exposure does not strip it across a season. For indoor and covered porch deep seating, velvet and linen-look weaves bring the softer finish that deep lounge chairs call for.