How to plan a homemade cover for a curved body pillow

Making a cover for a curved body pillow means drafting a custom pattern rather than cutting a simple rectangle. The pillow's crescent shape and rounded cross-section require you to trace the actual pillow, add a seam allowance, test the fit in inexpensive fabric, and then cut your final material.

Record the actual pillow shape and desired opening

Before you pick up scissors, gather materials for a paper pattern: a large roll of kraft paper or several sheets of newspaper taped together, a fine-tip marker, and a flexible tape measure.

Lay your pillow on the paper and trace slowly along the outer edge, keeping the marker upright so it does not angle inward. Do this twice — once for the front panel and once for the back — on separate sheets. If your pillow has an adjustable fill, like the shredded gel memory foam in The Cove Pregnancy Pillow, set the loft you normally sleep on before you trace, because changing the fill level later will alter the cross-section.

Once you have your outline, measure and mark the seam allowance. A common range for curved seams is 3/8 in to 5/8 in (10–16 mm). Choose one value and stay consistent across every edge of both pieces. Write the allowance on the pattern so you do not lose track of it mid-project.

Also decide now where your closure will sit. Common options include a zipper along the inner curve, an envelope overlap at one end, or snaps. Mark the opening location on the pattern before anything is cut.

Plan a test pattern before cutting the final fabric

A paper pattern confirms the shape, but only a fabric prototype confirms the fit. Use muslin, an old sheet, or any inexpensive woven fabric you can cut freely.

Pin your paper pieces to the test fabric, cut them out with your seam allowance included, and sew the perimeter seam. On the inner curved edges — where the crescent bends — clip small notches into the seam allowance after sewing, stopping just short of the stitch line. This allows the seam to open outward and lie flat rather than pulling or puckering. Skipping this step on tight inner curves is one of the most common reasons a prototype fits badly.

Slip the prototype over the pillow. Check the following before moving on:

• [ ] The cover lies smoothly along the full outer curve without pulling
• [ ] The inner curve is not bunched or puckered
• [ ] The ends close cleanly without gaping
• [ ] The closure opens and closes without straining the seam
• [ ] The cover slides on and off without requiring two people

Adjust the paper pattern, not the prototype, based on what you find. Redraw affected edges, re-cut the test fabric, and repeat until the fit is right. Only then are you ready to move to final fabric.

Allow for seams and the fabric's care requirements

Two preparation steps protect all the effort you put into fitting: finishing your seam edges and pre-washing your fabric.

Raw seam edges inside a cover that gets washed regularly will fray over time, weakening the seam. A zigzag stitch, a serged edge, or a bound French seam each address this differently. Which you choose depends on your machine and how much bulk you want inside the finished cover. Test your preferred finish on a scrap before committing.

Pre-washing is equally important. Wash and dry your chosen fabric using the same method you plan to use for the finished cover — for most wovens and knits, a cool machine wash works well — before you cut a single piece ¹. Fabric that has already been through a wash cycle will have released most of its residual shrinkage, so the cover you sew will hold its dimensions over time. The amount of shrinkage varies by fiber content and weave construction, which is why pre-washing the specific fabric you have is more reliable than applying a fixed percentage ¹.

If you are drawn to certified fabrics, look for labels such as OEKO-TEX STANDARD 100, which indicates the textile has been tested against a list of over 1,000 harmful substances ³. GOTS certification covers organic fiber processing across the full supply chain if organic content matters to you. Neither certification predicts how a fabric will sew or how much it will shrink, so pre-washing remains necessary regardless of what the label says.

For more on how cover construction affects daily use, the guide on knit vs woven body-pillow covers explains why the weave type changes how a cover stretches around a curved form.

Choose a closure you can fit without strain

The closure you add will be used every time you remove the cover for washing, so it is worth thinking through before you sew it in. The three most practical options for a crescent cover are:

A zipper placed along the shorter inner curve of the crescent is often the cleanest result: the straight pull of a zip suits the gentler curve at that edge, and the full opening makes it easy to guide the pillow in and out. If you use a zipper, sew and test it on the prototype first — zipper placement on a curve is harder to unpick and redo than a straight seam.

For a step-by-step look at how to actually get a crescent pillow into a fitted cover once it is sewn, see how to put a cover on a crescent body pillow.

Test fit on a prototype before finishing the cover

Once you have sewn your final cover in your chosen fabric — but before you finish the raw ends, add labels, or press all the seams flat — do one last fit check with the actual pillow.

Insert the pillow, close the opening, and lay it in the position you normally use it. Look and feel for:

• Seam lines tracking along the edges of the pillow rather than pulling to one side
• Even tension across the outer curve with no tight spots
• The closure lying flat against the pillow without a ridge that would press into your skin
• Enough ease that the cover does not strain when the pillow is compressed during use

If the final fabric is slightly less stretchy than your prototype fabric, you may find the fit is marginally tighter. Letting out the seam allowance by a small amount — 1/8 in (3 mm) per seam — can resolve this without re-cutting the pieces entirely.

Covers made from delicate or loosely woven fabrics may also need a reinforcing stitch at stress points, particularly at the corners near the closure. A few backstitches at each end of a zipper tape, or a bar tack at the corner of an envelope overlap, will extend the life of the cover significantly.

Once the fit is confirmed, press the seams, finish any remaining raw edges, and wash the finished cover before its first use ^{1 2}. This removes any cutting residue and confirms the cover still fits well after laundering — which is the true test of a well-planned pattern. For ongoing care, the guide on how to wash a body pillow and its cover covers what to check each time.

If you want a ready-made starting point, The Cove Pregnancy Pillow comes with a removable, machine-washable cover in a Tencel lyocell blend — useful as a reference for how a well-fitting crescent cover is proportioned before you begin drafting your own. The Cove Mini follows the same approach at a smaller scale, which can be helpful if you want to practice on a shorter crescent before tackling a full-length pillow.

More in this series: start with the body pillow buying guide, choosing a body-pillow cover color online and how to choose a cover that actually fits your body pillow.