How to Sew a Pillowcase from Knit Fabric

If you’ve ever slept on a satin or silk pillowcase and wondered what all the fuss was about, I’d like to introduce you to a lesser-known contender for the softest, coziest pillowcase you’ll ever own: one sewn from knit fabric. Knit pillowcases have a gentle stretch, a buttery-soft texture, and a casual, draped look that feels like wearing your favorite old t-shirt to bed — which, in a sense, is exactly what you’re doing.

The project is beginner-friendly, requires very little fabric, and can be completed in under an hour once you know the steps. That said, knit fabric comes with its own set of quirks, and if you try to treat it exactly the way you’d treat quilting cotton or linen, you’ll end up with wavy seams, a stretched-out mess, or a pillowcase that slowly unravels. This guide walks you through every step, from choosing the right knit fabric to finishing your seams so they look clean and hold up through dozens of washes.

Why Knit Fabric Makes Such a Good Pillowcase

Before diving into the how-to, it’s worth understanding why knit is such a good choice for pillowcases specifically.

Knit fabric is made from looped yarn rather than interlaced threads. Because of that structure, it naturally stretches and recovers, which means it moves with you while you sleep, reduces friction on your hair and skin, and almost never wrinkles. It breathes well, especially in cotton-based knits, and it’s machine washable without much fuss.

From a practical standpoint, knit pillowcases are also wonderfully forgiving to sew. The fabric grips a pillow insert without slipping, the raw edges are much less prone to fraying than woven fabrics, and the stretch means you don’t need to be super precise with your measurements. A pillowcase that comes out an inch smaller than intended will still slide onto a standard pillow just fine, because the fabric has the give to accommodate it.

The most popular knit choices for pillowcases are jersey knit, interlock knit, and bamboo jersey. Jersey is the classic t-shirt fabric — soft, drapey, and widely available. Interlock is a double-knit construction that’s a bit more stable and feels especially luxurious. Bamboo jersey is silky-smooth and highly breathable, making it wonderful for hot sleepers or warmer months. Any of these will make a beautiful pillowcase.

What You’ll Need

Gathering your supplies before you start makes the whole project go more smoothly. Here’s what you’ll need:

Fabric: For a standard pillowcase (20 x 26 inches), you’ll need about three-quarters of a yard of 60-inch-wide knit fabric. If your fabric is narrower, 45 inches wide, you may need a full yard to have enough room for your cut pieces. Always buy a little extra to account for straightening the grain.

Thread: Use a polyester thread rather than cotton. Polyester thread has a slight stretch to it, which means your seams won’t snap when the fabric pulls. All-purpose polyester thread works perfectly.

Sewing machine: A standard sewing machine will work, but you need to know how to either use a stretch stitch setting or a zigzag stitch. A serger (overlock machine) is a wonderful tool for knit pillowcases but absolutely not required.

Ballpoint or stretch needle: This is non-negotiable when working with knit fabric. A regular needle has a sharp point that can snag and pierce the loops in a knit, causing skipped stitches or small holes. A ballpoint needle (also called a stretch needle) has a slightly rounded tip that slides between the loops instead. Use a size 75/11 or 90/14 depending on the weight of your fabric.

Pins or wonder clips: Clips (sometimes sold under the brand name Wonder Clips or Sewing Clips) grip knit fabric more securely than pins and don’t distort it while you’re working. That said, pins work fine too if that’s what you have.

Scissors or a rotary cutter and cutting mat: Either works. A rotary cutter gives you the cleanest, most accurate cut on slippery knit fabric.

Iron and pressing cloth: A pressing cloth helps protect the surface of delicate knits from getting scorched or shiny.

Understanding Knit Fabric Before You Cut

Knit fabric has two directions of stretch: horizontal (across the width of the fabric, called the crossgrain) and vertical (along the length of the fabric, called the lengthwise grain). On most jersey knits, the greatest stretch is horizontal.

For a pillowcase, you want that stretch to run in the direction that allows the case to open and slide over the pillow — meaning the stretch should run across the width of your finished pillowcase, not along its length. This is the orientation that gives you the easiest insertion of the pillow and the snuggest fit once it’s on.

When you unroll your fabric from the bolt, the width of the bolt typically becomes the width of your cut piece, and you cut along the length. This is the standard orientation, and as long as you’re working with the fabric the way it came from the store (selvage edges on left and right, fold at the top if folded), your stretch will naturally be heading in the right direction.

Before you measure and cut, wash and dry your fabric. Knit fabric, especially cotton-based knit, will shrink a noticeable amount the first time it’s washed. Pre-washing saves you from a pillowcase that ends up too small the moment it goes through your laundry.

Measuring and Cutting Your Fabric

A standard pillow insert measures 20 x 26 inches. For a finished pillowcase with a comfortable fit and a tucked-in overlap at the back, you’ll cut your fabric using the envelope-style method, which is the simplest approach.

Here is how to cut the pieces:

The main body of the pillowcase is one large rectangle measuring 27 inches long by 42 inches wide. This piece will be folded in half to create both the front and back of the pillowcase.

The cuff (the folded hem at the open end) is a separate rectangle measuring 42 inches wide by 9 inches tall. This piece gets folded in half lengthwise and sewn to the open end of the pillowcase, creating a finished, double-layered cuff.

If you’d rather skip the separate cuff, you can cut the main body larger — 27 inches by 50 inches — and fold and hem the extra length yourself. The separate cuff method gives a cleaner look and is actually easier to manage.

Use a fabric marker or chalk to mark your measurements directly on the fabric before cutting. Cut slowly and steadily, especially if you’re using scissors, because knit fabric has a tendency to shift as you cut.

Setting Up Your Sewing Machine

Before you sew a single stitch on your pillowcase, test your machine on a scrap of the same knit fabric. This is important.

Insert your ballpoint needle. Thread your machine with polyester thread, both the top thread and the bobbin. Select a stitch — ideally a lightning bolt stitch (stretch stitch), a narrow zigzag stitch (width of about 0.5 to 1 and length of about 2.5), or a jersey stitch if your machine has one. Avoid a straight stitch unless your machine has a dedicated stretch stitch option, because a straight stitch will simply pop when the seam is stretched.

Sew a few inches on your scrap fabric and then tug gently on the seam. If the stitches hold without breaking, you’re good to go. If they snap, try a slightly wider zigzag or switch to a stretch stitch setting.

Set your presser foot pressure to a lighter setting if your machine has this option. Heavy presser foot pressure on knit fabric causes the fabric to be pushed and stretched by the feed dogs, resulting in wavy, stretched-out seams. Lighter pressure lets the fabric feed through naturally.

Sewing the Cuff

Start with the cuff piece, because finishing it first makes attaching it to the main body much easier.

Fold the cuff rectangle in half lengthwise, wrong sides together, so you have a long strip that is now 42 inches wide and 4.5 inches tall with a fold at the top. Press this fold gently with an iron (use a pressing cloth to protect the fabric and set your iron to a low heat appropriate for the fabric content).

Pin or clip the raw edges together along the bottom.

Set this piece aside for now.

Sewing the Main Body

Fold your main body rectangle in half, right sides together, matching the two short ends. The fold becomes the closed end of the pillowcase (the bottom), and the two open short ends are where the pillow goes in.

You do not need to sew along the fold — it’s already closed. You only need to sew the two long sides.

Starting at the fold, sew down one long side using a half-inch seam allowance. When you reach the open end, stop and backstitch. Repeat on the other long side.

Tip: Don’t sew across the fold itself. If you start your stitching right at the corner of the fold and sew toward the open end, the fold stays cleanly integrated into the seam.

If you have a serger, run both side seams through the serger instead of the regular machine. The overlocked edge gives a professional, clean finish and prevents any rolling or stretching of the seam allowance over time.

If you don’t have a serger, a zigzag stitch over the raw edges after you sew your seams will keep them tidy.

After sewing both side seams, clip the corners at the bottom fold (the closed end) diagonally to reduce bulk, being careful not to cut into your stitches. Turn the pillowcase right side out and press gently.

Attaching the Cuff

With the pillowcase still right-side out, bring your prepared cuff piece to the open end. The cuff has a folded top edge and two raw edges at the bottom.

Slide the cuff over the open end of the pillowcase so that the raw edges of the cuff are aligned with the raw edge of the pillowcase opening. The fold of the cuff faces away from the pillowcase body, pointing outward. All raw edges should be aligned, and the cuff should be sitting on the outside of the pillowcase.

Pin or clip the cuff to the pillowcase all the way around, distributing any ease evenly (if the cuff seems slightly larger than the opening, this is fine — gently spread the fullness out around the circle).

Sew around the opening using a half-inch seam allowance. Use your stretch stitch or zigzag. Because you’re sewing in a circle, overlap your starting and ending stitches by about an inch to secure the seam.

Once you’ve sewn all the way around, flip the cuff up and over so it folds back onto the pillowcase, encasing the raw seam inside. Smooth it down so it lies flat. The seam is now hidden inside the double layer of the cuff, and the cuff itself forms a neat, clean band at the opening of the pillowcase.

Press gently if desired.

If you want to anchor the cuff in place so it doesn’t shift around during washing, you can topstitch around the pillowcase right at the base of where the cuff meets the body, about a quarter inch from the cuff seam, using a stretch stitch.

Finishing Touches

Turn the pillowcase inside out one more time to inspect your seams. Give them a gentle tug to make sure the stitches hold. Clip any loose threads. If you notice any wavy spots along your seams, don’t panic — knit fabric relaxes beautifully after washing, and many minor imperfections disappear entirely.

Wash and dry the finished pillowcase before using it. This removes any fabric markings, relaxes the seams, and gives the knit that perfectly broken-in softness.

Tips for Sewing Knit Fabric Successfully

A few more things worth knowing as you work with knit:

Never pull or stretch the fabric through the machine as you sew. Let the feed dogs do the work. Pulling causes the fabric to stretch and your seams to wave. Hold the thread tails at the beginning of a seam, but after that, guide the fabric gently rather than tugging it.

If you notice your seams are still coming out wavy even with a lighter foot pressure and stretch stitch, try using a walking foot. A walking foot has its own set of feed dogs on top that grip the fabric from above, moving it through the machine at the same rate the lower feed dogs are moving it from below. This eliminates stretching almost entirely and is especially helpful for thick or especially stretchy knits.

Starch and sizing products designed for woven fabric can help stabilize very stretchy knits temporarily during cutting and sewing. Spray a light mist on the fabric, let it dry, and the fabric will behave much more like a stable woven. It washes out completely.

If you want to topstitch on knit fabric for decorative purposes or to anchor a hem, a twin needle (also called a double needle) gives you two parallel rows of stitching on the top side and a zigzag-style stitch on the back, which has built-in stretch. It mimics the professional look of a coverstitch machine without requiring additional equipment.

Variations to Try Once You Have the Basics Down

Once you’ve made your first knit pillowcase and felt how satisfying it is, there are plenty of ways to get creative.

Color blocking is an easy and striking variation. Instead of cutting one large rectangle for the main body, cut two or three horizontal strips of different coordinating knit fabrics and sew them together before proceeding with the rest of the pillowcase construction.

Adding piping around the seams of a knit pillowcase gives it a very tailored, finished look. Use a flexible cord piping sewn into a strip of knit bias tape (yes, you can cut knit fabric on the bias, and it doesn’t ravel) for a result that is both stretchy and sharp.

For a pillowcase with a pocket — handy for keeping a small sachet of lavender or a note tucked inside — sew a small rectangle of knit to the inside of the cuff before attaching it to the body.

If you want to make a set, coordinate your pillowcases with a knit duvet cover using the same fabric. The process is essentially the same as a pillowcase but scaled up, and having a matching set looks beautiful and effortlessly casual.

Troubleshooting Common Problems

Skipped stitches: Almost always caused by the wrong needle type. Switch to a ballpoint or stretch needle and test on a scrap.

Wavy seams: Usually caused by too much presser foot pressure or pulling the fabric. Try a walking foot and let the machine feed the fabric on its own.

Seams popping when stretched: You’re likely using a straight stitch. Switch to a zigzag or stretch stitch.

Fabric rolling at the edges: This is normal with knit and doesn’t affect the final result. Cut, clip together, and sew before the rolling drives you too crazy. It’s worse on jersey than on interlock.

The cuff won’t lie flat: Make sure the cuff seam was sewn with the cuff sitting on the outside of the pillowcase before folding it over. If it was attached inside out, the seam allowance will be on the outside and will prevent the cuff from lying flat.

Final Thoughts

Making a pillowcase from knit fabric is one of those projects that feels almost too easy once you’ve done it — and then you wonder why you didn’t start making your own bedding years ago. The fabric is affordable, the sewing time is minimal, and the result is genuinely better than most pillowcases you can buy at a retail price point. The stretch, the softness, and the way a well-made knit pillowcase keeps its shape wash after wash make it a project that’s absolutely worth adding to your regular sewing rotation.

Whether you’re a beginner who has just purchased their first sewing machine or an experienced sewist looking for a quick and rewarding weekend project, this is a pillowcase worth making. Start with one, notice how much softer your pillow feels, and see how long it takes before you’re cutting fabric for the whole set.