Custom Angled Bay Window Seat Cushion Set — 3 Pieces, Any Angle & Size

An angled bay window seat needs three cushions, not one. A canted bay window, also called an angled or splayed bay, has three flat sides: a wide center and two side panels that angle back toward the wall, usually at about 135 degrees. A single rectangular or trapezoid pad cannot follow those angled corners, so it gaps at the sides and slides toward the center. The fix is a matched three-panel set: a center panel plus two angled side panels, cut to your exact bay.

Ordering three separate cushions on your own is where most people get stuck. The angles rarely line up, and three separate orders can arrive in slightly different fabric or dye lots. Our builder solves both. You enter only the straight edge lengths of each panel, and it figures the angles and the shared seams for you, then cuts all three angled bay window seat cushions in one order from a single dye lot so the set matches.

Why customers choose us:

• Cut to your exact angles: measure three straight edges per panel and the builder derives every angle, so your sectional bay window cushions meet the canted corners with no gaps.
• The whole set in one order: center and both angled side panels ship together in the same fabric and dye lot, so the bay reads as one designed seat.
• Mirrored sides, no guesswork: the left and right wings are mirror images, so you measure one side and we match the other.
• High-density foam: a high-density foam core stays supportive at the angled edges through years of daily use, with a removable YKK zipper cover for washing.
• Made to your spec: choose Standard or Tufted, your thickness, piping, straps, and anti-slip backing; cover and foam together, with a plus or minus 0.5 inch tolerance.

How to measure your bay window set:

1. Work panel by panel: the left side, the center, and the right side.
2. For each panel, measure three straight lengths: the front edge, the back edge, and the depth (front to back).
3. Measure the cover or the seat base, not old flattened foam, so the new cushions fill the space.
4. Enter the numbers in the builder. It derives the angles and the shared seams for you, so you never have to measure an angle. Most canted bays meet at about 135 degrees.

The left and right wings are mirror images, so you only need to measure one wing. If your bay is an unusual shape, add the details in the order notes and our team will confirm before cutting.

Common questions:

• Do I order one cushion or three? One order. The builder makes all three panels together, in matching fabric and one dye lot.
• Do I need to measure the angle? No. Enter the straight edge lengths and the builder figures the angles and seams.
• Will the three pieces match? Yes. All three are cut from the same bolt and dye lot at the same time.
• What if my bay is a box or square bay? A box bay has 90 degree sides and one straight seat, so use our trapezoid bay window cushion instead.
• Can I get buttons? Yes. Choose Standard for a smooth top or Tufted for a buttoned, quilted look.

From a canted reading nook to a sunny kitchen bay, these custom bay window cushions turn an awkward angled seat into a finished, built-in looking window seat. Free shipping, made to order in about 20 business days.

An angled bay window, also called a canted or splayed bay, has three flat sides: a wide center and two side panels that angle back toward the wall, usually meeting at about 135 degrees. One trapezoid cushion cannot follow those angled corners without leaving gaps, so a canted bay needs three cushions: a center panel plus two angled side panels. This set makes all three angled bay window seat cushions in one order, cut to your exact sizes.

Perfect for:

• A canted or splayed bay window seat where the two sides angle back at roughly 135 degrees
• A reading nook or living room bay that needs a matched, built-in look across all three panels
• Replacing old or mismatched cushions on an existing three-panel bay window set
• One of many fits in our custom window seat cushions collection, sized to your exact window
• A simpler box or square bay with one straight seat is better served by our trapezoid bay window cushion

Choose Standard (smooth) or Tufted buttons, pick your thickness and fabric, and all three cushions arrive ready to drop into your bay for an exact fit.

This set is built for an angled (canted) bay window: three flat facets, a wide center panel and two side panels that angle back to the wall, usually meeting at about 135 degrees. If your window seat has straight sides that angle away from the room, this is the right set.

The right fit:

• Canted or splayed bay windows with three flat sides (center plus two angled sides)
• Angled window seats where the two ends turn back toward the wall at roughly 120 to 150 degrees
• Three-panel bay seats that need all pieces matched in one fabric and dye lot
• Standard or tufted finish, any thickness, indoor or outdoor fabric

Not the right fit:

• Box or square bay (sides meet the front at 90 degrees, one straight seat): use our trapezoid bay window cushion.
• Bow window (a curved run of windows, no flat facets): a curved seat is not covered by this straight-edge set.
• A single flat window seat (one straight bench): a simple window seat cushion fits better.

Not sure which you have? Count the flat sections of your seat. Three flat sections that angle back means an angled bay and this set; one straight section means a standard window seat cushion.

Bay windows get concentrated sun, so fabric choice matters more here than on a shaded seat. We cut all three panels of your canted bay window cushion set from the same dye lot, so the center and both angled sides match exactly.

All fabrics are:

• Available in fade- and UV-resistant outdoor or performance weaves for sunny, south-facing bays
• Offered in soft indoor upholstery for shaded living room and bedroom bays
• Available in marine grade for high-humidity or moisture-prone windows
• Easy to wipe or spot-clean, with removable YKK zipper covers
• Chosen from 90-plus colors and patterns, all cut from one matched dye lot

For a bright, sun-filled bay we suggest a fade-resistant outdoor or performance fabric; for a shaded indoor nook, a soft upholstery weave reads warmer. We do not offer fireproof fabric. Note that tufted covers in marine fabric are splash-resistant, not fully waterproof, because the button stitching pierces the surface.