Price with selected options
Window seats are always custom — that's the whole problem. Builders frame the bench to the wall, not to a cushion catalog, so the foam ends up 52 inches, or 67, or 74 and a half. No store sells that cover. A custom window seat cushion cover is sewn to the exact run of your sill: one clean piece, edge to edge, with no seam breaking up the line and no short cushion sliding around the bench.
The fit matters for looks, but the fabric matters for survival. South-facing glass turns a window seat into the sunniest spot in the house, and it's exactly where cheap covers die first. Solution-dyed Sunbrella keeps its color through years of that treatment — and if the seat lives outdoors on a covered porch, a waterproof window seat cushion cover in Horizon vinyl protects the foam through blown-in rain too.
If the bench is fine but the cushion looks tired, you don't need a new cushion. A replacement window seat cushion cover over the existing foam brings the nook back for a fraction of the cost — and you pick the fabric this time.
Outfitting more than the nook? Shop all custom outdoor cushion covers and cover every bench in the house in one order.
Why Choose Our Custom Window Seat Cushion Covers?
One Cover for the Whole Run
A 70-inch bench gets a 70-inch cover — not two 35s sliding apart. Single-piece construction keeps the upholstered line unbroken from wall to wall, which is what makes a window seat read as built-in rather than improvised.
Glass Makes Sun Stronger, Not Weaker
A window concentrates UV on the same band of fabric every afternoon. Solution-dyed acrylic and vinyl take that exposure without the bleached stripe that gives away a printed fabric within a season.
Soft Enough for a Book, Tough Enough for Boots
Canvas gives the nook a true upholstery feel for long sits. Horizon turns a mudroom bench into a wipe-clean surface that shrugs off wet gear. Same tailoring either way — the room decides the fabric.
Wash Day Without a Fight
The zipper spans the entire back edge, so even a very long cover slides off the foam in seconds. Spot-clean Canvas with mild soap; wipe Horizon where it sits. Deep cleans stop being a reason to put it off.
Tailoring That Survives Daily Use
Window seats get sat on every day, not just on weekends. Squared corners at your true thickness, double-stitched seams, and a warranty-backed fabric keep the cushion crisp through years of coffee-and-book mornings.
Step-by-Step Measuring Guide
• Lift the foam off the bench and set the old cover aside — the foam is your template.
• Measure the full length of the foam along the front edge.
• Measure the depth from the front edge back to the wall side.
• Measure the thickness at the side face of the foam.
• Confirm all three numbers a second time, then enter them at checkout exactly as measured.
Window seats punish fabric in a way patios don't: the glass focuses sunlight on the same strip of cushion every single day, and printed fabric shows a bleached stripe within a year. Both of our Sunbrella options are solution-dyed — color locked into the fiber during manufacturing — so the strip never appears. Canvas is the usual pick here: a woven acrylic with a genuine upholstery hand, breathable, water-repellent, and soft enough for a reading nook.
If your window seat doubles as the landing zone for wet boots, dog paws, or juice cups — think mudroom or kitchen bay — step up to Sunbrella Horizon. It's a marine-grade waterproof vinyl that wipes clean in one pass and still flexes softly enough to sit on comfortably.
Long cushions need long zippers, so we run the YKK closure across the full back edge. A six-foot cover comes off in one motion for washing, and the corrosion-resistant coil never shows from the front. Seams are double-stitched, with the corners squared to your stated thickness.
• Cut to the full run of your sill — length, depth, and thickness, to the quarter inch
• Long single-piece covers that don't gap, ride up, or split into mismatched pads
• Sunbrella Canvas for a soft upholstered look; Horizon vinyl where spills rule
• Solution-dyed color rated for sun that pours through glass all day
• Fits bay windows, reading nooks, alcoves, and mudroom benches
• Extra-long YKK zipper spans the back edge for easy removal
• Both fabrics carry a 5-year limited warranty
