Custom Bench and Window Seat Cushions: Foam and Cover Guide

Cushion, cover, or foam: choosing the right product

The most useful first step is deciding whether you need a complete cushion, a replacement cover, or new upholstery foam. A complete custom cushion from Royal Shade USA combines a made-to-order cover with 70D high-resilience foam. Choose a cover fabric suited to indoor seating, outdoor use, water exposure, or a household with pets, and confirm the finished cushion specifications for your setting. A cover-only order is the right choice when the existing insert still has useful support and you only want to refresh the fabric. Separately, custom cut 70D upholstery foam works well for furniture restoration, DIY upholstery, or a new insert that will be paired with a cover you already have.

This distinction matters because it changes how you measure and what you need to provide. A complete cushion should be fitted to the furniture opening plus your preferred finished thickness. A cover-only order should match the existing insert and closed cushion dimensions. Cut foam should match the cavity or cover pattern, and its listed product limits apply specifically to the foam product. For the foam-only listing, thickness options are 1 to 4 inches and maximum dimensions are 47 inches wide by 150 inches long. That is not a universal limit for all finished cushions.

Complete custom cushions are configurable, but fabric and finish are choices rather than one universal all-purpose solution. An indoor fabric may not be the best fit for a covered patio, and an outdoor fabric is not automatically the softest indoor choice. Waterproof and pet-friendly selections are separate cover options, so identify the main use before contacting the team with dimensions. Unusual shapes may require a drawing or tracing.

Measuring benches, chairs and window seats

Start with the furniture, not with the old cushion. Old foam can be compressed or twisted, so it should be a secondary reference rather than the only measurement source. For a chair seat, bench, or built-in window seat, measure the usable seating opening at both the front and back widths. Also measure the left and right depths. Walls, arms, and aprons are not always square, so these paired measurements matter.

Do not simply record the largest width and depth or assume that fitting inside the recess means picking one universal dimension. Note any taper from front to back or left to right. Record the narrowest constraints, such as a recessed area between arms, and confirm the corner shape. For a window seat, measure at the deepest point and the narrowest point if the bay is angled, then confirm whether you want a single rectangular pad or a shape that follows the bay geometry. Irregular corners, rounded ends, and cutouts are easier to specify with a kraft paper or cardboard template. Before finalizing, confirm fit allowances and the drawing with the Royal Shade USA team. The foam measurement guide gives a step-by-step approach for replacement work.

When ordering a cover-only product, measure the existing insert at its widest and deepest points, then measure the closed cushion with the insert inside. Note the finished thickness separately. Do not subtract a generic seam allowance or apply a fixed 10 percent reduction. Different fabrics and edge finishes have different makeup allowances, so provide the finished dimensions you want, not a guessed subtraction.

Foam thickness and seat height

Think of foam thickness as one part of the finished seat height. Check how the new cushion changes the seating height against the backrest, armrest, table, and knee clearance. The foam-only product is available in 1 to 4 inches and is described as firm. The complete cushion uses 70D high-resilience foam and can be specified by thickness for the intended furniture. Do not assume that any thickness fits any chair; a thicker cushion can raise the user enough to change the backrest position or knee clearance.

For benches and bay windows where people sit for longer periods, ask whether the current pad is too low or too high, not just whether it looks worn. If the cover will be reused, the new foam should match the cover height closely enough that the fabric does not over-stretch or sag. Include a side-view photo of the furniture so the team can review the finished height and front edge alongside your measurements.

The Polyurethane Foam Association foam performance guide explains that density is mass per unit volume, while firmness is assessed separately using indentation force deflection, or IFD. The Royal Shade listings use the designation 70D; ask the team for exact density units and firmness information if these are important to your project. The foam-only product separately describes its feel as Firm.

Fabric choices and Circle Fleece

Indoor, outdoor, waterproof and pet-friendly should be treated as separate cover fabric selections. A covered patio cushion still needs an outdoor-friendly cover, but outdoor fabric alone does not make the complete cushion watertight. Seams, zipper areas, and the foam interior are not sealed like a dry bag. Select weather-resistant fabric for outdoor use, keep the cushion dry when not in use, and follow the product care instructions for the finished item.

The Circle Fleece Anti-Pet Scratch Bay Bench/Window Cushion combines 70D foam with custom fabric, dimensions, and finish choices. Its product image illustrates rectangular quilted bench pads. For an angled bay window or an unusual bench opening, send a drawing and confirm the actual cushion shape, quilting, and edge finish with the team. A pet-friendly or scratch-resistant fabric option can be considered for frequently used seating; compare the texture, cleaning instructions, and available colors before choosing your cover.

Zippers, ties, anti-slip and edge finish

The complete cushion product includes a removable zipper cover. Confirm zipper placement so the opening will be accessible when the cushion is fitted to the furniture. When replacing an existing cover, a photo of the old zipper and seams helps explain the finish you want to reproduce.

Ties and anti-slip options are available where applicable. Send a photo of the furniture and ask the team to confirm a suitable fixing method, tie positions, and surface compatibility. Review the edge style and seam placement against a reference photo or drawing before production. For shaped seats, include a template that shows curved corners, angled backs, or side notches.

Replacement covers and practical care

Cover-only orders fit best when the existing insert is still usable and the closed cushion dimensions are known. The cushion cover collection and Cushion & Cover collection can be used to compare available options. A cover-only product is not a complete cushion, so padding and foam are not included. Measure the insert and the closed cushion, then choose the fabric and color rather than assuming a cover will also improve foam support.

The cover-only listing allows machine or hand washing, low-temperature drying, and avoiding high-temperature ironing. Follow the care label for the specific fabric you order, and remove the foam before washing a removable cover. Foam needs its own care instructions. The Association for Contract Textiles cleaning resource recommends following product or fabric-supplier instructions and spot-testing cleaning methods in an inconspicuous area. Keep a copy of the fabric care instructions with your order details for future cleaning.

US custom ordering checklist

The custom cushions, replacement covers, and cut foam described here are listed as made in the USA. Royal Shade USA also lists West Coast direct dispatch for its custom cushions and covers. For a made-to-size project, confirm fabric availability, the approved drawing, production timing, and the dispatch location with the team. Production and transit time should be confirmed separately when planning your furniture refresh.

Before submitting an order, record the finished dimensions, preferred thickness, fabric use, edge finish, tie or anti-slip choice, and any template notes. For cover-only work, include the existing insert dimensions and closed cushion dimensions. For unusual shapes, provide a drawing or photo that shows the full usable area. If the furniture is outdoors, request an outdoor fabric choice and plan to keep the cushion covered or dry when not in use. For more detail, visit the shipping policy page or contact Royal Shade USA with your project notes.

If you are still deciding between ready options and full custom work, the cushions collection is a useful starting point alongside the complete custom cushion, cover-only, and cut foam product pages linked above.

Frequently asked questions