Square Sofa Cushions — Custom Size Seat Cushions, Any Fabric

Square sofa cushions sound simple until you try to buy a replacement. Modern and modular sofas use square seat cushions in sizes that vary by brand, and a cushion an inch off in either direction looks wrong and slides on the frame. Stock square cushions come in a handful of sizes that rarely match.

USCUSHION cuts each square sofa cushion to your exact measurements. You give us the width, depth, and thickness, choose your foam density and fabric, and the square cushion arrives sized to sit square on the frame with no overhang or gap.

Why customers choose us:

• Cut to your exact square: Made to your seat's width, depth, and thickness, so the cushion sits square on the frame without sliding or overhang.
• Choose your foam density: Pick a firmness that suits a modern sofa seat, from a plush lounge feel to a firmer everyday seat.
• Match one or a full set: Order a single square cushion or a matched set for a modular sofa, all in the same foam and fabric.
• Foam that holds its shape: High-density foam keeps a square seat crisp at the edges instead of rounding off and sagging.
• Removable zip covers: YKK zipper covers come off for washing so the cushion stays fresh through daily use.

You May Also Like:

• couch cushion replacement
• custom seat cushions for couch
• sectional couch cushions

Every square sofa cushion is made to order. See more in our custom couch cushions collection.

Square sofa cushions show up on modern and modular sofas where the seat is a clean square rather than a deep rectangle. A custom square cushion is cut to your exact frame so it sits square and stays put, the way the original did.

Perfect for:

• Square couch cushions on modern and modular sofas whose seats are square, not rectangular
• Square sofa cushions for a sectional or platform sofa that uses matched square seats
• Replacement square cushions where the original foam has flattened or the cover has worn
• Daybed and bench seats that use a square cushion cut to the platform size
• Square seat cushions for a reading nook or window bench built to square dimensions

Order a single square cushion or a matched set for a modular frame. Every piece is cut to your exact width, depth, and thickness.

Square sofa cushions suit modern and modular sofas, platform daybeds, and square bench seats where the seat is a clean square. The made-to-fit build works with contemporary decor, keeping crisp lines a stock cushion cannot hold.

A square sofa cushion sits on a modern frame where clean lines matter, so the fabric should hold a crisp look while taking daily use. Our catalogue covers upholstery grades and performance weaves that suit a contemporary sofa.

All fabrics are:

• Durable enough for the daily use a main sofa seat takes
• Easy to wipe clean after everyday living room use
• Soft and comfortable while holding a crisp, square shape at the edges
• Fade-resistant so the fabric holds color through years of use
• Available in a wide range of colors, from clean neutrals to bold modern tones

For a modern living room, a smooth upholstery weave or velvet gives square cushions a clean, tailored look. For a high-use family sofa, a durable performance fabric holds up best.