Fraying is when the threads along a cut edge come loose and unravel. Some fabrics barely do it, and others shed threads as soon as you cut. Here is a quick guide to what to expect and how to handle it.
Why Does Fabric Fray?
Woven fabrics are made by crossing threads over and under each other. When you cut one, the cut ends are free to pull away. How much they do depends on how tightly the fabric is woven, the type of fiber, and the thread.
| Fabric | Frays? | Notes |
|---|---|---|
| Quilting cotton | Moderate | Tightly woven, but it will fray with washing. Prewash or finish edges. |
| Flannel | Yes | Soft, loosely woven cotton that sheds lint and threads. Prewashing makes it fray more, so finish the edges first. |
| Organza | Heavily | Sheer, slippery and fine. Use a French seam or other seam finish. |
| Linen | Heavily | Loose weave that frays and creeps. Finish seams. |
| Denim | Yes | Frays into a fringe on cut edges, which some people like as a look. |
| Knits (jersey) | No | Knit fabric does not fray, though the edges may curl. |
| Felt and fleece | No | Not woven, so no unraveling. |
What Happens to Fraying After You Sew?
Here is a reassuring reminder: once fabric is sewn, the raw edges and their fraying are contained in the seam allowance, rather than along the outside of your finished project. A few fuzzy threads inside a quilt are not a reason to worry! In a traditionally pieced quilt, those allowances are tucked between the quilt top and backing, so they receive much less handling than a loose cut edge.
That does not mean a straight seam seals the raw edge completely. On a garment, bag, or loosely woven fabric, exposed seam allowances can still fray in the wash. If threads unravel all the way to the stitching line, the seam can weaken. Choose a seam finish for exposed allowances, and follow the pattern’s allowance rather than trimming it extra narrow. French seams actually enclose the raw edges; zigzagging or serging helps secure them.
Quilting Cotton: A Little Fuzz Is Normal
Quilting cotton has a woven structure, so cut edges can release individual threads. Tightly woven cotton usually behaves well while you piece, but repeatedly picking up a stack of small squares or pulling a stray thread can make the edges look ragged. Keep cut pieces stacked flat, lift them gently, and clip loose threads instead of tugging them. A fresh rotary blade helps make a clean cut without chewing the edge.
For a standard pieced quilt, an accurate ¼-inch seam allowance is usually enough; you do not need to serge every little patchwork seam. If you prewash yardage, zigzag or serge the two cut ends first to reduce the tangle in the washer, then press and square up before cutting. Small precuts are a different story: washing them loose can shrink or unravel them enough to change their usable size. Follow the manufacturer’s advice and your pattern before prewashing charm squares or narrow strips.
Flannel: Allow for Shrinkage and a Softer Weave
Flannel’s brushed surface feels wonderfully cozy, but many flannels have a more open weave than quilting cotton. The cut edges can shed both loose threads and surface lint. When making a washable project from yardage, check the care instructions and prewash as the finished item will be washed. Finish the cut ends first, and allow extra fabric for shrinkage before you begin cutting your pattern pieces.
Handle cut flannel pieces as little as possible, and press by lifting and lowering the iron instead of sliding it across the fabric. Test a seam on scraps: if threads pull away easily, the project may need a wider allowance or a seam finish. Do not simply widen seams on an existing quilt pattern, though, because that changes the finished block size. Choose a pattern designed for flannel or adjust the cutting dimensions as well. Rag quilts are the intentional exception, with exposed allowances clipped to create that soft, frayed texture.
Organza: Enclose Those Delicate Edges
Organza is a sheer woven fabric, and its fine threads can work loose quickly. Cut a single layer on a flat surface, use sharp scissors or a rotary cutter, and avoid carrying the pieces around before sewing. Fine pins placed within the seam allowance keep pinholes out of the visible fabric. A fresh fine needle and a test seam help you spot snagging or puckering before starting the real project.
A French seam is a lovely choice for suitable straight or gently curved seams because it encloses the raw edges without leaving a bulky finish visible through the sheer fabric. Follow a French-seam tutorial and plan the allowance before cutting; the first seam must be narrow enough that its trimmed edge stays inside the second seam. For other seam shapes, try a narrow overcast finish on a scrap. Fray-preventing liquid can leave a visible stiff or dark spot on sheers, so always test it somewhere hidden first.
Linen: Match the Finish to the Weave
Linen can be densely woven or quite open, so not every piece frays at the same rate. Before cutting, rub the edge of a small scrap gently between your fingers. If threads loosen immediately, plan to finish the raw edges soon after cutting rather than letting a pile of pieces sit through lots of handling. Prewash washable linen yardage according to its care instructions, securing the cut ends first.
For garment seams, zigzagging, serging, or binding the allowances helps keep those loose threads under control. A French seam can work well on lightweight linen when the pattern and seam shape allow it. Heavier linen may become bulky inside a French seam, so test several layers before committing. Leave the allowance specified by the pattern: trimming a loosely woven linen seam too close gives the threads less room before they reach the stitching.
Denim: Decide Whether You Want a Fringe
Denim is sturdy, but its woven cut edges still fray. For jeans, bags, or other projects that should stay neat inside, finish exposed allowances with a zigzag, serger, or a suitable enclosed seam. A flat-felled seam encloses the edges and is common on denim garments, but it adds layers. Test bulky intersections with a denim needle and a slow sewing speed rather than forcing the fabric through the machine.
If you want a fringed hem or a deliberately ragged edge, make the fraying part of the plan. Sew a line of stitching above the area you intend to fringe, leaving enough length for both the fringe and a secure seam. Pull only a few crosswise threads at a time and stop before the stitching. Wash and check the edge as it develops; a fringe can grow with repeated laundering. For a clean hem instead, turn the raw edge under and stitch it out of sight.
Jersey and Other Knits: Watch for Curling, Not Just Fraying
Jersey is made with interlocking loops rather than the crossed threads of a woven fabric. Most jerseys do not fray in the same way as quilting cotton, but a cut edge may roll into a little tube. Let the fabric lie relaxed on the cutting surface, avoid stretching it as you cut, and use pins or clips to keep a curled edge aligned before stitching. A ballpoint or stretch needle can help avoid damaging the loops; test the appropriate type for your fabric.
Use a narrow zigzag, a suitable stretch stitch, or a serger so the seam can stretch with the project. A regular straight stitch may pop when the fabric stretches. Not every knit is a non-raveling jersey: loosely knitted fabrics and sweater knits may run or unravel, so test an actual cut edge before deciding to leave it unfinished. A knit edge can also deserve a finish simply because you want it to look tidy, even when fraying is not the concern.
Felt and Fleece: Usually No Fraying, but Different Behaviors
Felt is made from matted or bonded fibers, not woven threads, so a cut edge usually stays put. That makes it useful for appliqué, ornaments, and small hand-sewn projects where the edge is meant to show. Cut cleanly with sharp scissors, and test your particular felt before washing: craft felt and wool felt can react differently to moisture and heat. A blanket stitch can be decorative rather than necessary to stop unraveling.
Polar fleece is generally knitted and does not fray like a woven fabric, although some fleece can shed fuzz at a fresh cut edge. Check which direction stretches most before placing the pattern, and keep the layers relaxed while sewing. Reduce bulk only as your pattern allows, and avoid high iron heat on polyester fleece. A simple raw edge may suit a no-sew blanket; a garment or frequently handled edge may look better with a stitched finish. Test a scrap rather than assuming every plush or fleece-like fabric behaves the same way.
Quilting Cottons to Try for Your Next Project
These 100% cotton fabrics at Missouri Star Quilt Company were in stock when this gallery was updated. These four prints offer florals, bright color, and a lighter coordinating option, each sold as a 2-yard cut. Click a photo or its caption to see that exact fabric and current availability.
Shop more fabric by the yard at Missouri Star.
How to Stop Fabric From Fraying
- Pinking shears cut a zigzag edge that limits fraying.
- Zigzag or overcast stitch along the raw edge on a regular machine.
- Serger trims and finishes the edge in one pass. See All About Sergers.
- French seams enclose the raw edges completely. See how to sew a French seam.
- Fray-preventing liquid can seal a cut edge, especially for small areas.
- Prewash with care. Washing can cause fraying, so stitch or finish the edges of loose weaves first.
Related Guides
Read everything you need to know about flannel and how to sew with organza, chiffon and other lightweight fabrics. You’ll find pinking shears and other helpful tools in sewing and quilting notions.
What is the fraying-est fabric you’ve sewn? Tell us in the comments!
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