What You'll Make and Why It Works for Beginners
A pillowcase is one of the easiest sewing projects because it uses only straight seams, requires no zippers or buttons, and forgives small mistakes. You will sew two pieces of fabric together on three sides, turn it right-side out, and close the opening by hand or machine. The finished pillowcase fits a standard pillow and takes two to three hours from start to finish, including breaks.
This project teaches you the core skills you need for almost every other sewing task: measuring, cutting straight lines, pinning fabric, sewing a consistent seam, and finishing edges. Once you finish one pillowcase, you will know whether sewing is something you want to keep doing, and you will have made something you actually use.
Key Takeaways
- A standard pillowcase needs two pieces of fabric cut to 21 by 31 inches, which you can measure and cut with a ruler and scissors or a rotary cutter.
- Pin the two pieces together with the pretty sides facing each other, then sew three sides with a half-inch seam allowance, leaving one short end open.
- Turn the pillowcase right-side out through the opening, push the corners out with a blunt tool, and press flat with an iron before closing the opening.
- The opening closes either by machine (a straight stitch along the folded edge) or by hand (a ladder stitch that is nearly invisible), depending on your comfort level.
- Common beginner mistakes include cutting pieces that are not square, sewing too close to the edge, and not pressing seams flat before closing the opening.
Gather Your Materials and Tools
You need two pieces of fabric, each measuring 21 by 31 inches. Cotton quilting fabric or cotton broadcloth works best for beginners because it does not slip around while you sew and presses flat easily. Avoid stretchy fabrics like jersey or knits until you have finished a few projects. You can buy fabric at a fabric store, order it online, or use old sheets or clothing you no longer wear.
For tools, you need a sewing machine (any basic model will work), thread that matches or complements your fabric, pins, scissors or a rotary cutter, a ruler or measuring tape, an iron, and a needle for hand-sewing the opening closed. A seam ripper is optional but useful if you make a mistake and need to remove stitches. If you do not own a sewing machine, many fabric stores and community centers rent them by the hour.
Before you start, test your machine on scrap fabric to make sure the needle is threaded correctly and the tension is balanced. The stitches should look the same on both sides of the fabric—if the top thread is loose or bunched, adjust the tension dial or rethread the machine.
Measure and Cut Your Fabric Pieces
Lay your fabric on a flat surface with the selvage (finished edge) running along one side. Using a ruler and a pencil or fabric marker, mark two rectangles that are 21 inches wide and 31 inches long. The marks do not need to be perfect, but they should be as close to square as you can make them. If you have a rotary cutter and a self-healing cutting mat, use those instead—they cut straighter lines faster and with less effort than scissors.
Cut along your marked lines with sharp scissors or a rotary cutter. Dull scissors will fray the fabric and make your edges ragged. If you are using scissors, cut slowly and keep the blade flat against the fabric. Once both pieces are cut, stack them and check that they are roughly the same size. Small differences (a quarter-inch or so) will not matter, but if one piece is noticeably larger, trim it to match.
Before you move to the next step, press both pieces flat with an iron set to the temperature recommended for your fabric. This removes wrinkles and makes it much easier to pin and sew the pieces together accurately.
Pin and Sew Three Sides Together
Lay one piece of fabric on your work surface with the pretty side (the side you want to show) facing down. Place the second piece on top with its pretty side also facing down, so the two pretty sides are facing each other. This is called right sides together, and it is the standard way to sew fabric pieces so the seams end up hidden inside the finished pillowcase.
Starting at one corner, insert pins every 3 to 4 inches along three sides of the rectangle, leaving one short end (21 inches) unpinned. This unpinned end is where you will turn the pillowcase right-side out later. Push the pins straight through both layers so they hold the fabric flat and aligned. The pins should be perpendicular to the edge you are about to sew.
Set your sewing machine to a straight stitch with a stitch length of 2.5 millimeters (a standard setting on most machines). Thread the machine and tie a knot at the end of the thread. Starting at one corner of a pinned side, lower the presser foot and begin sewing. Sew slowly and steadily, keeping the edge of the fabric aligned with the half-inch mark on the throat plate (the metal guide on your machine). Remove pins as you approach them—do not sew over pins, as this can break your needle.
When you reach a corner, stop with the needle down, raise the presser foot, turn the fabric 90 degrees, lower the presser foot again, and continue sewing. Repeat this at each corner. When you finish the third side and reach the corner near your unpinned opening, backstitch (sew backward) three or four stitches to lock the thread, then cut the thread and remove the fabric from the machine.
Turn, Press, and Prepare to Close the Opening
Trim the corners of the sewn pillowcase by cutting away a small triangle of fabric at each corner, about a quarter-inch from the seam. This reduces bulk and helps the corners look sharp when you turn the pillowcase right-side out. Be careful not to cut into the seam itself.
Reach through the unpinned opening and grab the fabric from the inside. Pull gently and steadily until the entire pillowcase turns right-side out. The pretty sides are now facing outward, and the seams are hidden inside. Push your fingers or a blunt tool (the eraser end of a pencil works well) into each corner from the inside to push the corners out fully and make them square.
Lay the pillowcase flat on your ironing board and press all the seams with a hot iron. Pay special attention to the opening—fold the raw edges inward by half an inch on both sides and press them flat. This creates a clean edge that is easier to close and looks more finished. Let the pillowcase cool for a minute before moving it.
Close the Opening by Machine or Hand
You have two options for closing the opening: a machine stitch or a hand stitch. The machine method is faster but slightly more visible. The hand method takes longer but is nearly invisible if done carefully.
Machine method: Pin the opening closed with the folded edges aligned. Thread your machine and sew along the fold line with a straight stitch, sewing as close to the edge as you can. Backstitch at the beginning and end to lock the thread. This creates a visible seam on the outside, but it is sturdy and quick.
Hand method: Thread a needle and tie a knot at the end. Starting at one end of the opening, insert the needle into the fold of one side of the opening so the knot stays hidden inside. Bring the needle out and insert it directly across into the fold of the other side. Move the needle along inside the fold for about a quarter-inch, then bring it back out and insert it into the opposite side again. Continue this back-and-forth motion along the entire opening. The stitches will be nearly invisible from the outside. When you reach the end, tie off the thread inside the pillowcase.
Common Mistakes and How to Avoid Them
The most common beginner mistake is cutting fabric pieces that are not square. Measure twice and cut once. Use a ruler with a right-angle corner, and check that your corners are 90 degrees before you start sewing.
Another frequent error is sewing too close to the edge or too far from it, which creates uneven seam allowances. The half-inch seam allowance is standard, and your machine likely has a guide mark on the throat plate to help you stay consistent. Practice on scrap fabric first if you are unsure.
Beginners also often skip pressing the seams and the opening edges before closing. This makes the finished pillowcase look lumpy and unprofessional. Take the time to press—it takes five minutes and makes a visible difference.
Finally, do not panic if your stitches are not perfectly straight or if you have to pick out a seam and resew it. Every sewer does this, and the practice makes you better. A pillowcase is forgiving because the imperfections end up on the inside or are hidden by the pillow itself.
Frequently Asked Questions
What size fabric do I need for a different pillow size?
For a standard pillow, use 21 by 31 inches. For a queen pillow, use 21 by 35 inches. For a body pillow, use 21 by 55 inches. The width stays at 21 inches; only the length changes. Add half an inch to each dimension if you want a looser fit.
Can I use a different type of fabric?
Cotton works best for beginners, but you can also use linen, flannel, or cotton blends. Avoid stretchy fabrics like jersey or knits until you have more experience. Slippery fabrics like satin or silk are harder to control and require special techniques.
What if I sew the opening closed by mistake?
Use a seam ripper to carefully cut and remove the stitches along one short side. Once the opening is clear, you can turn the pillowcase right-side out. If you have already sewn all four sides, you will need to cut a small opening in one side, turn it right-side out, and then close that opening by hand.
How do I keep my seams straight while sewing?
Use the guides on your machine's throat plate to keep the fabric edge aligned at a consistent distance from the needle. Sew slowly and watch the edge of the fabric, not the needle. If you find it hard to stay straight, practice on scrap fabric first or use a walking foot, which is an optional presser foot that helps feed fabric evenly.
Do I have to press the fabric before I start?
Pressing before you cut and sew makes measuring and sewing much easier because the fabric lies flat. If your fabric is only slightly wrinkled, you can skip this step, but pressing takes just a few minutes and is worth the effort.