How to Make a Bench Cushion | Custom Fit For Any Bench

Making a bench cushion involves measuring the bench, cutting foam slightly smaller, adding batting, and building a fabric cover.

Before you buy a single supply, measure the bench top carefully. A cushion that fits well starts with accurate numbers, whether you plan to sew a removable cover or staple fabric to plywood for a no-sew version. Here’s the full process from measurement to finished cushion.

Measure the Bench First

Start with the bench’s length and width — those are your finished cushion dimensions. Then reduce the foam size slightly to account for batting and fabric bulk. Cut the foam about 1/2 inch shorter than the bench width and depth, which prevents the finished cushion from bowing outward at the edges.

For a no-sew cushion with a plywood backing, leave about 1/4 inch of space all the way around the board so the fabric wraps cleanly without adding bulk at the corners. If you’re making a sewn cover, plan for seam allowances of about 1/2 inch on every panel you cut.

Cut the Foam and Add Batting

Use an electric kitchen knife or a serrated blade for cutting foam — a regular straight knife will drag and tear the surface. Cut slowly and keep the blade vertical for a clean, square edge.

Wrap the foam in batting before building the cover. Batting softens the sharp foam edges, smooths the transition from foam to fabric, and gives the cushion that professional upholstered look instead of a hard, blocky silhouette. If you’re using spray adhesive to bond foam to a plywood base, work in a ventilated area and follow the label directions.

Build the Cover: Sewn or No-Sew

Two approaches work, and the right one depends on your bench and your priorities. A sewn cover from a top piece, bottom piece, and side strips gives you a removable, washable cushion. Staple fabric to plywood for a faster no-sew build that works best on benches that can support a rigid base.

• Sewn cover: Cut top and bottom panels plus side strips, join them with 1/2-inch seam allowances, and add Velcro on the back flap for easy removal and washing.
• No-sew cover: Cut fabric about 1/4 inch larger than the plywood base, fold the corners like wrapping paper, smooth them flat, and staple along each edge.
• Corner care: Whether sewing or stapling, join corners carefully and smooth out lumps before securing — this is where wrinkles and puckers happen.

HGTV’s bench cushion tutorial walks through the full sewing method with step-by-step photos.

Common Mistakes and Quick Fixes

The most frequent error is cutting the foam too large. It seems counterintuitive, but foam that’s oversized makes the final cushion bulge and fit poorly against the bench. Keep the foam slightly smaller than the bench or backing, and let the batting and fabric make up the difference.

Skipping batting is the second most common shortcut that backfires. Bare foam edges look sharp and leave visible gaps between the cushion and the bench. A single layer of batting smooths those transitions completely.

If you’re shopping for a ready-made option instead of building your own, our roundup of benches with storage and cushion included covers tested models that skip the DIY work entirely.

Uneven staple tension and sloppy corner folding cause most no-sew wrinkles. Pull fabric taut before each staple, and fold corners with crisp, sharp creases rather than rounded bunches. For washable covers, double-check that seam allowances and closure placement leave enough room for the foam to slide in and the Velcro to close flat.