A handmade king-sized pillowcase is one of those sewing projects that looks suspiciously impressive compared with the effort involved. It requires no zipper, no buttons, no complicated curves, and no wrestling match with elastic. You are essentially sewing a large, well-dressed rectangle.
This project is beginner-friendly, practical, and easy to customize. Choose crisp cotton for a hotel-style finish, lightweight linen for relaxed elegance, or satin when your pillow deserves to behave like it has a personal stylist. Once you understand the basic measurements, you can make matching pillowcases for every bedroom without relying on a commercial pattern.
Most conventional king pillows measure approximately 20 by 36 inches, although actual dimensions can vary by manufacturer. Some branded king pillows are slightly smaller, so measuring the pillow you plan to cover is more reliable than trusting the label alone.
Finished Size and Fabric Requirements
The pattern in this guide produces a pillowcase measuring approximately 20 inches high by 38 inches long. That gives a typical 20-by-36-inch king pillow enough breathing room without leaving so much extra fabric that the pillow appears to be wearing an oversized sleeping bag.
Fabric Needed for One King-Sized Pillowcase
- 1.5 yards of 44- or 45-inch-wide fabric
- Coordinating all-purpose thread
- A fresh universal sewing-machine needle
You may be able to make the pillowcase from less than 1.5 yards, but the additional fabric allows for shrinkage, uneven store cuts, pattern matching, and the occasional cutting decision made before the coffee has started working.
Recommended Cutting Measurement
For one simple king-sized pillowcase, cut one rectangle:
41 inches wide by 43 inches long
This measurement includes room for French seams and a generous folded hem at the opening. It works well with standard 44- or 45-inch fabric because the selvages can be removed while still leaving approximately 41 usable inches across the width.
Choosing the Best Fabric for Pillowcases
The best pillowcase fabric feels comfortable against the skin, survives frequent washing, and behaves reasonably well under a sewing-machine foot. Technically, you could make a pillowcase from upholstery velvet, but your washing machine, sewing machine, and face would probably organize a formal protest.
Quilting Cotton
Quilting cotton is an excellent choice for beginners. It is easy to cut, does not slide around excessively, presses cleanly, and is available in thousands of colors and prints. It may feel slightly crisp at first, but repeated washing generally softens it.
Cotton Percale
Cotton percale is ideal when you want a cool, smooth pillowcase with a classic hotel-bed appearance. It is lightweight, breathable, and usually easy to sew. Because some sheet-weight fabrics are wider than ordinary quilting cotton, they can also be economical when making several cases.
Linen and Linen Blends
Linen creates a breathable, relaxed-looking pillowcase. It wrinkles enthusiastically, but that is part of its charm. A cotton-linen blend offers much of linen’s texture while being less slippery and easier to press.
Satin or Silk
Satin and silk create smooth pillowcases with a luxurious feel. However, slippery fabrics can shift while cutting and sewing, making them better suited to an adventurous beginner or intermediate sewer. Use fine pins or fabric clips, a sharp needle, and a slightly shorter stitch length.
Tools and Supplies
- Sewing machine
- Iron and ironing board
- Fabric scissors or a rotary cutter
- Large cutting mat, if using a rotary cutter
- Long acrylic ruler or yardstick
- Fabric marker or tailor’s chalk
- Straight pins or sewing clips
- Seam gauge
- Point turner or blunt knitting needle
A rotary cutter is convenient, but it is not essential. Sharp fabric scissors and careful marking work perfectly well. The important goal is to create a true rectangle with square corners. When the starting rectangle is crooked, the finished pillowcase may twist after washing.
Prepare the Fabric Before Cutting
Prewash and Dry the Fabric
Wash and dry the fabric using the same method you expect to use for the completed pillowcase. Prewashing allows likely shrinkage to occur before the pieces are measured and sewn. For woven fabrics that fray heavily, finishing or zigzagging the raw ends before washing can prevent a tangled fringe from consuming usable yardage.
After drying, press the fabric thoroughly. Do not attempt precision cutting while the material resembles a crumpled treasure map.
Square the Fabric
Fold the fabric with the selvages together and check that the fold lies flat. If diagonal wrinkles appear, shift one layer slightly until the fabric relaxes. Trim the cut edge so it is perpendicular to the fold or selvage.
Remove the selvages before measuring the final rectangle. Selvages are tightly woven and may shrink differently from the main fabric, potentially causing puckering along the seam.
Check Directional Prints
Before cutting fabric printed with trees, animals, words, or other one-way designs, determine which edge will become the pillowcase opening. Otherwise, your carefully selected woodland scene may spend its life growing sideways.
How to Make a King-Sized Pillowcase Step by Step
Step 1: Cut the Main Rectangle
Measure and cut one rectangle 41 inches wide by 43 inches long. Confirm the measurements at several points before cutting. The 41-inch edge will wrap around the height of the pillow, while the 43-inch edge will run from the closed end to the opening.
For a fuller or unusually thick king pillow, increase the width to 42 inches. For a pillow that measures less than the conventional 20-by-36-inch size, use the customization formula later in this guide.
Step 2: Mark the Opening Edge
Choose one 41-inch edge to become the opening. On the wrong side of the fabric, mark a line 1/2 inch from this edge. Mark a second line 4.5 inches from the same edge.
These lines create a clean double-fold hem:
- Fold the raw edge toward the wrong side by 1/2 inch.
- Press the fold carefully.
- Fold the edge over again by 4 inches.
- Press and pin or clip the hem in place.
Step 3: Sew the Opening Hem
Stitch close to the inner folded edge, approximately 1/8 inch from the fold. Sew slowly enough to keep the line straight. Backstitch at the beginning and end so the seam does not loosen during laundering.
For a decorative finish, add a second row of topstitching about 1/4 inch from the first. This optional detail helps the cuff stay flat and gives the pillowcase a polished appearance.
Step 4: Fold the Pillowcase Wrong Sides Together
Fold the rectangle in half lengthwise with the wrong sides together. The right side of the fabric should be visible on the outside.
This may feel incorrect if you have learned that sewing projects are normally assembled right sides together. Trust the process. The first line of stitching is the beginning of a French seam, which encloses the raw edges inside a second seam.
Align the long raw edges and the short edge opposite the hem. Match the two ends of the opening carefully so the cuff remains even. Pin or clip along the long side and the closed end.
Step 5: Sew the First French-Seam Pass
Starting near the opening, sew down the long side using a 1/4-inch seam allowance. Pivot at the bottom corner and continue across the short end.
Keep the seam allowance consistent. If necessary, place a strip of painter’s tape on the sewing machine’s needle plate as a visual guide.
French seams are particularly useful for pillowcases because they hide fraying edges without requiring a serger. Sewing educators commonly recommend them for bedding that will be washed frequently.
Step 6: Trim and Press the First Seam
Trim the seam allowance to approximately 1/8 inch. Remove loose threads, especially around the corner. Do not skip the trimming step; stray fibers can extend beyond the second seam and create an unexpected fuzzy stripe.
Press the seam flat as sewn. Next, turn the pillowcase wrong side out and push out the bottom corners gently. Roll the sewn edges between your fingers so the first line of stitching sits directly at the fold, then press again.
Step 7: Sew the Second French-Seam Pass
With the pillowcase wrong side out and the right sides facing each other, sew along the same long side and closed end using a 3/8-inch seam allowance.
This second line of stitching traps the trimmed raw edges inside the seam. Before sewing the entire length, inspect the folded edge to ensure no loose fibers are sticking out. Adjust the allowance slightly wider if necessary.
Step 8: Finish the Corner
At the bottom corner, take one or two diagonal stitches rather than creating an extremely sharp 90-degree point. A slight taper reduces bulk and helps prevent the corner from developing a floppy fabric “ear.” Trimming excess seam allowance and shaping corners gradually can produce a neater pillow cover.
Step 9: Turn and Press
Turn the pillowcase right side out. Use a point turner, chopstick, or blunt knitting needle to shape the corners. Avoid using scissors for this job unless you enjoy adding surprise ventilation holes to finished projects.
Press the side seam, closed end, and cuff. The pillowcase is now ready to use.
How to Customize the Measurements
Not every king pillow is exactly the same size. Some manufacturers sell king pillows measuring roughly 18 by 34 inches, while traditional sizing guides commonly use 20 by 36 inches. Measuring the actual pillow prevents either a loose, droopy case or a pillow packed inside like an overfilled burrito.
Custom Width Formula
Measure the pillow from front to back around its fullest point. Alternatively, measure its height and thickness while it is lying flat.
For a simple one-piece pillowcase, use:
Cut width = twice the pillow’s height + thickness allowance + 1 inch
For an average 20-inch-high pillow, a 41- or 42-inch cut width is usually sufficient. Add another inch for a very firm or high-loft pillow.
Custom Length Formula
Use:
Cut length = pillow length + 2 inches of ease + 4.5 inches for the hem + seam allowance
For a 36-inch pillow, this formula produces a rectangle approximately 43 inches long. Increase the ease if you prefer a looser case or regularly use thick pillow protectors.
Optional Design Upgrades
Add a Contrasting Cuff
Instead of folding the main fabric into a hem, attach a separate contrasting band. The popular “burrito method” encloses the cuff seam by rolling the body fabric inside the band before stitching. It is widely used because it creates a clean finish with no exposed cuff seam.
For a king pillowcase, cut the main panel approximately 36.5 by 41 inches and the cuff approximately 9 by 41 inches. Add a folded 2-inch accent strip between them for a narrow decorative flange.
Add an Interior Envelope Flap
An envelope flap helps prevent the pillow from sliding out. Extend the opening end by approximately 6 to 8 inches, hem the edge, and fold the extension toward the inside before sewing the side seams. The pillow slips beneath the flap and remains hidden.
Closed-overlap pillowcases are especially helpful for active sleepers and for decorative bedding where the pillow’s white protector should not peek through the opening.
Add Embroidery or Decorative Stitching
Embroider initials, a small motif, or a border before assembling the pillowcase. Position embellishments far enough from the opening edge to account for the folded hem. Test decorative stitching on scrap fabric first so you can check tension, thread weight, and stabilizer removal.
Common Pillowcase-Making Mistakes
Skipping Prewashing
Unwashed cotton may shrink after the pillowcase has been completed. The seams cannot shrink in exactly the same way as the surrounding fabric, so the case may twist or pucker.
Cutting Before Squaring the Fabric
A rectangle measured from an uneven store-cut edge may not be rectangular at all. Straighten one edge first, and then measure from that reliable reference line.
Making the Case Too Tight
Pillows have depth as well as height and length. A case made to the exact flat dimensions of the pillow may fit on paper but become difficult to insert. Include ease for loft and for any pillow protector beneath the case.
Sewing the First French Seam Right Sides Together
The first French-seam pass must be sewn with wrong sides together. If the first pass is sewn conventionally, the second pass will not enclose the raw edges correctly.
Using Excessive Heat on Delicate Fabric
Cotton generally tolerates a hot iron, but satin, silk, and synthetic blends may scorch, shine, or melt. Test the iron temperature on a scrap and use a pressing cloth when necessary.
Care Instructions for Handmade Pillowcases
Wash cotton pillowcases with similar colors using a gentle or normal cycle. Avoid overloading the washer, as tightly packed bedding may not rinse thoroughly. Dry according to the fabric’s care requirements and remove the cases promptly to reduce wrinkling.
Close any zippers on nearby laundry items before washing. Exposed zipper teeth and hooks can catch lightweight fabric. For satin or silk, use a mesh laundry bag and a mild detergent unless the fabric manufacturer recommends dry cleaning.
Pressing is optional for everyday use. Your pillow will not file a complaint if the case has a few wrinkles.
Experience-Based Lessons From Making King-Sized Pillowcases
The first lesson learned from making king-sized pillowcases is that the pillow itself should always be measured. A package may say “king,” but that word is less precise than it sounds. One pillow may be a conventional 20 by 36 inches, while another is shorter, narrower, or dramatically thicker. When I relied only on the label, I created a beautiful case that fit the pillow with the determination of a compression sock. Adding one extra inch to the width solved the problem immediately.
The second lesson is that fabric preparation affects the result more than fancy sewing equipment. A carefully prewashed and pressed piece of inexpensive cotton often produces a better pillowcase than costly fabric cut while wrinkled. Pressing after each major step may feel repetitive, but it keeps the cuff flat, sharpens the seams, and makes the finished project look intentional rather than recently rescued from a laundry basket.
Directional prints also deserve more attention than they initially appear to require. Before cutting, I now place the fabric on the table in the same orientation it will have on the bed. This simple check prevents flowers from growing toward the floor, birds from flying into the headboard, and printed words from appearing upside down. Large motifs may require extra yardage because the design must be centered or matched across the folded case.
French seams became my preferred finish after comparing them with basic zigzagged edges. A zigzag finish is faster, but a French seam looks cleaner and feels smoother inside the pillowcase. It also contains the loose threads that can appear after repeated washing. The technique sounds sophisticated, yet it consists of two straight seams, a little trimming, and an important reminder about which sides of the fabric face each other.
I also learned not to force a point turner aggressively into the corners. On one early project, the corner looked perfect for approximately two seconds, followed by the appearance of a tiny hole. A blunt tool and gentle pressure are safer. Slightly rounding or tapering the stitched corner usually creates a cleaner shape than trying to produce a needle-sharp point.
Another useful discovery is that making two pillowcases at once is significantly more efficient than making them separately. Prewash enough fabric for the pair, cut both rectangles during the same session, and sew each step assembly-line style. Hem both openings, sew both first French-seam passes, trim both, and then complete both second passes. The process saves setup time and helps the two cases match.
For gift pillowcases, contrasting cuffs provide the most visual impact with the least additional work. A solid body with a patterned cuff feels modern, while a playful main print with a quiet coordinating cuff keeps the design from becoming too busy. A narrow accent strip can make the pillowcase look professionally pieced even though it adds only one straightforward seam.
Finally, perfection is not required. A slightly wandering line of topstitching becomes nearly invisible once the pillow is on the bed. The important details are secure seams, comfortable fabric, enough room for the pillow, and a cuff that lies flat. Each pillowcase improves cutting accuracy and sewing confidence, making this an ideal project for practicing basic skills while producing something genuinely useful.
Conclusion
Learning how to make king-sized pillowcases requires little more than a large fabric rectangle, straight stitching, careful pressing, and accurate measurements. A 41-by-43-inch cut works well for many conventional king pillows and creates a roomy case with a polished folded cuff.
French seams keep the interior neat, while custom cuffs, accent bands, embroidery, and envelope closures allow the same basic pattern to suit almost any bedroom. Measure the actual pillow, prewash the fabric, and take time to square the starting rectangle. Those three habits prevent most pillowcase problems before the sewing machine is even switched on.
Note: Pillow dimensions, fabric width, loft, and shrinkage vary. Make a test case or adjust the measurements when working with an unusually firm, thick, or nonstandard king pillow. This guide was synthesized from established bedding-size references and sewing guidance published by Sleep Foundation, Better Homes & Gardens, Casper, The Spruce Crafts, Sew4Home, AllPeopleQuilt, Seamwork, National Sewing Circle, Craftsy, and Brother USA.
