Sewing letters onto fabric with a machine is faster and more durable than hand stitching
You can attach fabric letters to a garment or project using your sewing machine in about 15 to 30 minutes per letter, depending on size. The most reliable method is to cut letters from fusible interfacing or stabilizer, iron them to the back of your chosen fabric, cut out the letter shape, then stitch around the edges with a tight zigzag stitch. This creates a letter that won't fray, won't shift during washing, and looks finished on both sides.
The key is using the right stabilizer underneath your work so the fabric doesn't pucker, and keeping your stitch length short enough that the thread locks the fabric edges together. Most home machines can handle this without special attachments—you just need to adjust two settings and practice on scrap fabric first.
Key Takeaways
- Fusible interfacing bonded to the back of your letter fabric prevents fraying and gives you a crisp edge to stitch around.
- Tear-away stabilizer placed under your project stops puckering and keeps letters from shifting while you sew.
- A zigzag stitch with length set to 1.5 to 2.0 mm and width set to 3.0 to 4.0 mm locks fabric edges and looks professional.
- Stitching slowly by hand (using the foot pedal gently or the hand wheel) gives you better control around curves and corners.
Gather your materials and prepare your workspace
You will need: your sewing machine, thread that matches or contrasts with your letter fabric, fusible interfacing (the kind with adhesive on one side), tear-away stabilizer, fabric for the letters, an iron, scissors or a rotary cutter, and the garment or project you are attaching letters to. Print or draw your letter template at the size you want—letters smaller than 2 inches tall are difficult to stitch neatly on a home machine.
Set up your ironing board near your sewing machine so you can move between the two without cooling down your iron. Test your iron temperature on scrap fabric first—fusible interfacing bonds at medium to medium-high heat, usually around 350°F (175°C). If your iron is too cool, the interfacing won't stick; if it is too hot, it can scorch the fabric or the adhesive can gum up your iron plate.
Fuse interfacing to your letter fabric and cut out the shape
Cut a piece of fusible interfacing slightly larger than your letter template. Place the interfacing shiny side down on the back of your letter fabric (the side that will face inward when sewn). Press your iron down firmly for 10 to 15 seconds, then lift and move to the next section. Do not slide the iron—pressing and lifting prevents wrinkles and ensures even adhesion. Let the fabric cool for one minute before handling.
Once cooled, place your letter template on top of the fused fabric and trace around it with a pencil or fabric marker. Cut out the letter shape with sharp scissors or a rotary cutter, cutting as close to the line as you can. The interfacing will hold the fabric edges together so they won't fray while you work. If you are making multiple letters, repeat this process for each one.
Attach stabilizer to the back of your project fabric
Tear-away stabilizer prevents your project fabric from puckering when you stitch. Cut a piece of stabilizer slightly larger than your letter and pin it to the back of your project fabric where the letter will go. The stabilizer should cover the entire area where your stitching will happen—if your letter is 3 inches tall, your stabilizer should be at least 4 inches tall and 4 inches wide.
If your project fabric is stretchy (like knit or jersey), use two layers of stabilizer. If it is woven cotton or linen, one layer is usually enough. Do not iron the stabilizer on—pinning works better because you need to tear it away after stitching, and heat can make it harder to remove.
Position the letter and find it before stitching
Place your cut letter on top of the project fabric where you want it to go. Pin it in place with three or four pins around the edges, or use a temporary fabric glue stick to hold it flat. The fusible interfacing on the back of the letter will not stick to your project fabric—it only prevents fraying—so you must pin or glue it to keep it from shifting while you sew.
If you are attaching multiple letters to spell a word, measure the spacing between them before you pin. A good rule is to leave a gap equal to the width of one letter between each letter. Step back and look at the placement from a distance—what looks right up close often looks off when you see the whole piece.
Stitch around the letter edge with a tight zigzag
Thread your machine with thread that matches your letter fabric or contrasts with it, depending on the look you want. Set your stitch length to 1.5 to 2.0 mm and your stitch width to 3.0 to 4.0 mm, then select the zigzag stitch. Test the stitch on a scrap piece of fabric with stabilizer underneath—the zigzag should lock the fabric edge without bunching or skipping stitches.
Position the letter under your presser foot so the needle will land just inside the letter edge when you start. Lower the presser foot and begin stitching slowly, using gentle pressure on the foot pedal or turning the hand wheel by hand for the first few stitches. Stitch all the way around the letter edge, pivoting at corners by leaving the needle down, lifting the presser foot, turning the fabric, and lowering the foot again. Stitch slowly around curves—rushing causes the needle to skip or the fabric to bunch.
When you reach the starting point, overlap your stitches by about half an inch, then backstitch to lock the thread. Trim the thread tails close to the fabric.
Remove stabilizer and finish the edges
Once you finish stitching, tear away the stabilizer from the back of your project. Tear it in small pieces rather than trying to pull it all at once—small tears are less likely to pull your stitches loose. If any stabilizer remains stuck in the stitches, use a stiff brush or an old toothbrush to brush it away.
Inspect the stitching on both sides. If you see loose threads or gaps where the zigzag did not fully lock the edge, you can go back and stitch over those spots again. Once you are satisfied, press the letter flat with your iron on medium heat to set the stitches and smooth any wrinkles. Your letter is now permanently attached and ready to wear or display.
Common mistakes and how to avoid them
Puckering around the letter: This happens when you skip the stabilizer or use only one layer on stretchy fabric. Always use at least one layer of tear-away stabilizer under your project, and two layers if the fabric is knit or jersey.
Fraying edges after stitching: The fusible interfacing should prevent this, but if edges still fray, your iron was not hot enough or you did not press long enough. Test your iron on scrap fabric and press for the full 10 to 15 seconds.
Thread bunching or skipping stitches: This usually means your needle is dull or bent. Replace the needle before you start—a fresh needle makes a huge difference. Also check that your thread is wound correctly and that the presser foot is down (the foot must be down to engage the tension discs).
Stitches too loose or too tight: If stitches are loose, increase the stitch width slightly or slow down your stitching speed. If they are too tight and puckering the fabric, decrease the width or check that your stabilizer is pinned flat underneath.
Frequently Asked Questions
Can I sew letters on without using fusible interfacing?
You can, but the edges will fray after a few washes. Interfacing takes five minutes and prevents fraying completely, so it is worth doing. If you skip it, use a very tight zigzag stitch and plan to re-stitch the edges every few months.
What thread color should I use?
Match the thread to your letter fabric if you want the stitching to blend in. Use a contrasting color if you want the stitching to show as a design detail. Either way, use good-quality thread—cheap thread breaks easily and leaves gaps in your zigzag.
How do I sew curved letters like S or R without puckering?
Stitch slowly and use two layers of stabilizer. Pivot frequently around curves instead of trying to turn the fabric smoothly—pivot every quarter inch or so. This gives you more control and prevents the fabric from bunching.
Can I use my machine's built-in letter fonts instead of cutting fabric letters?
Yes, if your machine has an embroidery function. Embroidery stitches letters directly into the fabric without cutting and pinning. However, embroidery machines are different from regular sewing machines, and the setup is more complex. The fabric-cutting method works on any sewing machine.
How long will sewn-on letters last through washing?
Letters stitched with a tight zigzag and fusible interfacing usually last through 50 to 100 washes before the stitching starts to loosen. Wash in cold water and tumble dry on low heat to extend the life. If stitches do loosen, you can re-stitch over them.