The basic method: a straight stitch along the raw edge

The simplest way to finish a fabric edge is to sew a straight line about a quarter-inch from the raw edge, then trim the excess fabric close to that line. This works best on woven fabrics like cotton, linen, and quilting cotton. You are essentially creating a barrier that the weave can grip, so the threads don't pull loose.

Set your machine to a standard straight stitch with a stitch length of 2.0 to 2.5 millimeters. Position the fabric so the raw edge runs along the quarter-inch mark on your presser foot (most presser feet have a line marked at that distance). Sew slowly and keep the edge straight. Once you reach the end, backstitch to lock the thread.

After sewing, use sharp fabric scissors or a rotary cutter to trim the loose threads as close as you can to the stitching line without cutting the thread itself. This method is fast and works on almost any fabric weight, but it does leave a visible line of stitching on the edge.

Key Takeaways

  • A straight stitch sewn a quarter-inch from the raw edge, followed by trimming, is the fastest method and works on most woven fabrics.
  • A zigzag stitch covers the raw edge and prevents fraying without requiring a second step, making it ideal for knits and stretchy fabrics.
  • A rolled hem creates a narrow, finished edge that looks polished and works well on lightweight fabrics like silk and voile.
  • Bias tape binding wraps the raw edge completely and is the most durable finish for items that will see heavy use or frequent washing.
  • Different fabrics fray at different rates—knits rarely fray, while loosely woven fabrics fray quickly and need finishing before assembly.

Using a zigzag stitch to cover the edge

A zigzag stitch is more forgiving than a straight stitch and actually covers the raw edge rather than just sealing it. Set your machine to a zigzag stitch with a width of 2.5 to 3.0 millimeters and a length of 2.0 millimeters. Position the fabric so the needle catches both the fabric and the air just beyond the edge—this way the stitch wraps around the raw threads and locks them in place.

This method works especially well on knit fabrics, stretchy materials, and anything that moves a lot during wear. The zigzag gives with the fabric instead of creating a rigid line. It is also faster than a straight stitch because you do not need to trim afterward. The finished edge will have a visible zigzag line, but it is a professional-looking finish that most sewers use on garments.

If your fabric is very loosely woven or prone to heavy fraying, you can sew two parallel zigzag lines close together for extra security. This is sometimes called a double zigzag finish.

Rolling the edge for a narrow, polished finish

A rolled hem creates a very narrow finished edge that looks elegant on lightweight fabrics like silk charmeuse, voile, and fine cotton. The technique involves folding the raw edge under twice and stitching it down so the fold itself becomes the finished edge. This method takes more practice than a straight or zigzag stitch, but the result is worth it for garments that will be seen from both sides.

Fold the raw edge under by about a quarter-inch and press it with an iron. Then fold it under again by another quarter-inch and press. The raw edge is now completely enclosed. Sew along the inner fold line using a straight stitch, keeping the line as close to the fold as you can. Use a presser foot with a guide or a rolled-hem foot if your machine has one—these feet help keep the fold even and straight.

This finish is delicate and works best on fabrics that are not too thick. If your fabric is heavy or stiff, the rolled edge will look bulky. Test on a scrap first to see how your fabric responds.

Binding the edge with bias tape for durability

Bias tape is a strip of fabric cut on the bias (at a 45-degree angle to the grain) and folded so it has finished edges on both sides. When you wrap bias tape around a raw edge and stitch it down, you create a finish that is both attractive and extremely durable. This is the standard finish on armholes, necklines, and hems of garments that will be washed and worn frequently.

You can buy pre-made bias tape in most fabric stores, or you can make your own from fabric scraps. To explore it, unfold one side of the bias tape and pin it to the raw edge of your fabric, right sides together. Sew along the crease line using a straight stitch. Then fold the tape over to the back side of the fabric and pin it in place. Sew it down from the front, stitching in the groove created by the first seam—this is called stitch-in-the-ditch and it catches the tape on the back without visible stitching on the front.

Bias tape comes in different widths (usually half-inch or one-inch when folded) and many colors and patterns. It is the most visible finish you can use, so choose a tape that complements your fabric or matches it exactly.

Choosing a finish based on fabric type

Not all fabrics need the same finish. Knit fabrics like jersey and interlock rarely fray because the loops lock together, so a straightforward zigzag or even no finish at all is often enough. Woven fabrics fray much more readily and should be finished before you assemble the garment, or the loose threads will catch and pull.

Lightweight fabrics like silk, voile, and fine cotton look best with a rolled hem or narrow bias tape. Medium-weight fabrics like quilting cotton and linen work well with a straight stitch or zigzag. Heavy fabrics like canvas, denim, and upholstery fabric are so tightly woven that they barely fray, and a straightforward straight stitch or zigzag is usually enough.

Stretchy fabrics like lycra and spandex blends need a stitch that moves with them—a zigzag or a ballpoint needle with a straight stitch. If you use a regular needle and a rigid stitch on a stretchy fabric, the seam will snap when the fabric is pulled.

Finishing seams inside a garment versus edges on the outside

The edges you see on the outside of a finished garment (like the neckline or armhole) usually get bias tape or a rolled hem because they need to look polished. The seams inside the garment (the side seams, shoulder seams, and so on) can be finished with a straight stitch or zigzag because they are hidden from view.

Many sewers finish interior seams with a zigzag stitch as a matter of habit, because it prevents fraying and takes only a few extra seconds. If you are making something that will be washed frequently, finishing the interior seams extends the life of the garment by preventing the seams from coming apart as the fabric frays.

If you are making a garment from a pattern, the pattern instructions will tell you which edges need finishing and which method to use. Always read the pattern notes before you start cutting.

Common mistakes and how to avoid them

The most common mistake is sewing too close to the raw edge. If your stitch line is right at the edge, there is nothing for the weave to grip, and the fabric will still fray. Always leave at least a quarter-inch of fabric between the raw edge and your stitch line.

Another mistake is using the wrong stitch for the fabric. A rigid straight stitch on a stretchy fabric will snap. A rolled hem on heavy fabric will look lumpy. Test your finish on a scrap of the actual fabric you are using before you commit to the whole project.

Trimming too close to the stitching line is also a problem—you risk cutting the thread itself and unraveling your work. Leave a small margin of loose thread beyond the stitch line. It will not fray further because the stitch holds it.

Frequently Asked Questions

Do I have to finish every edge before I sew the seams?

No. You can finish the raw edges after you have assembled the garment, and many sewers do this because it is faster. However, if you are working with a fabric that frays heavily, finishing before assembly prevents loose threads from getting caught in your seams. Read your pattern instructions—they will specify the order.

What is the difference between a zigzag stitch and a three-step zigzag?

A standard zigzag stitch moves left-right-left-right in one motion. A three-step zigzag (sometimes called a multi-step zigzag) moves left-center-right-center-left-center-right, creating a denser, more stable stitch. The three-step version is better for stretchy fabrics and heavy fraying, but it is slower and uses more thread.

Can I use pinking shears instead of sewing?

Pinking shears cut a zigzag line along the raw edge, which slows fraying but does not stop it completely. They work on medium-weight woven fabrics that do not fray heavily, but they are not a substitute for sewing on knits, stretchy fabrics, or anything that will be washed frequently. Use them as a quick finish on items that will not see heavy wear.

What if my fabric is so thin that a rolled hem looks too bulky?

Use a single fold instead of a double fold. Fold the raw edge under once by a quarter-inch, press it, and sew it down. The raw edge will still be visible on the back, but the front will look clean. Alternatively, use a very narrow bias tape (quarter-inch) instead of the standard half-inch width.

Do I need a special presser foot to finish edges?

No, but some feet make the job easier. A quarter-inch foot helps you maintain an even distance from the edge. A rolled-hem foot automatically folds and guides the fabric for a rolled hem. A walking foot helps feed thick or slippery fabrics evenly. None of these are required—you can finish edges with a standard presser foot and careful hand guidance.