How to Turn a Fat Quarter into Bias Binding for Sewing Projects
A fat quarter tucked into your stash can quietly become one of the most useful things in your sewing room. With a few passes of the rotary cutter, an iron, and a little patience, that small square of quilting cotton transforms into yards of flexible trim ready to edge a dress, finish a quilt, or trim a handmade cushion. Bias binding hugs curves without puckering, lies flat on necklines and armholes, and adds a thoughtful pop of contrast or a subtle self-finish, depending on how you play it.
If you have ever reached for store-bought tape and found the colour slightly off, the width awkward, or the price a bit rich for a small project, making your own from a fat quarter is a satisfying workaround. It costs almost nothing beyond your time, lets you match prints to your garment exactly, and uses a shape most sewists already have on hand. The technique is forgiving, the math is simple, and the result is sturdy enough to survive years of washes.
Why Bias Binding Is Worth the Effort
Bias binding is cut on the diagonal of the fabric, at a 45-degree angle to the selvedge. That direction gives the woven threads their maximum stretch, which is exactly why the strip can curve around a collar, an armhole, or the edge of a circular hem without twisting or pulling. A strip cut on the straight grain would refuse to bend smoothly, and one cut on the cross grain offers only a little give. The bias, by contrast, behaves like a soft tape that wants to wrap whatever you feed it.
A fat quarter, that 50 by 55 centimetre rectangle most Australian quilters pick up at Spotlight or The Fabric Store, is oddly perfect for the job. Its shape means you can cut long continuous strips on the true bias, with very little waste, even from a single quarter metre. The size is generous enough for a small project like a child's pinafore or a fabric basket, and small enough that a beginner can manage the whole process on the kitchen table. Choosing your print is half the fun. If you enjoy a bit of a flutter on a bold colour combo, working out a striking pair is a bit of a calculated risk, and the trim will reward you every time you wear the finished piece.
Tools, Fabric, and Fat Quarter Prep
Before you make the first cut, lay everything out so the workflow stays calm. A clean cutting mat, a long acrylic ruler, a sharp rotary cutter, fabric scissors, a hot iron, and a few pins or wonder clips are really all you need. A fabric marking pen or tailor's chalk helps if you want to draw the lines first, though confident cutters often skip that step. Press your fat quarter thoroughly before you start; any crease will distort the bias and lead to wobbly strips.
The fabric itself matters more than people expect. Lightweight cotton lawns, voile, and standard quilting cotton all cut and press beautifully. Heavier canvas or thick linen works but takes more steam and a heavier hand. Silky or slippery fabrics can behave, but pin them well or use a walking foot later when you attach the binding. Avoid anything too bulky for the project you have in mind, since the binding will double over the raw edge.
| Fabric Type | Suitability for Bias Binding | Pressing Behaviour | Best Projects |
|---|---|---|---|
| Quilting cotton | Excellent, crisp edges and stable weave | Holds a sharp crease easily | Quilts, dresses, cushion edges |
| Cotton lawn or voile | Very good, lightweight drape | Needs a press cloth to avoid shine | Blouses, summer dresses, baby wear |
| Linen (light to medium) | Good, softens after washing | Takes steam well, springs back | Aprons, totes, relaxed garments |
| Canvas or denim | Fair, bulky when doubled | Heavy, needs high heat and steam | Utility bags, structured edges |
| Satin or sateen | Good but slippery | Can scorch, use a cloth | Evening trim, decorative edges |
A standard fat quarter gives you roughly 4 to 5 metres of finished bias binding once the strips are joined, depending on the width you choose. Most garment projects call for strips 2.5 centimetres wide before folding, which is a comfortable middle ground. Quilters often prefer 5 centimetres for binding a quilt edge, so adjust the strip width to suit where the binding is heading.
Cutting the True Bias in Clean Strips
Lay the fat quarter flat with the selvedge running vertically. Fold one corner down so the bottom edge meets the side edge, creating a triangle. Press lightly to hold the fold, then unfold. You now have a faint diagonal crease that marks the 45-degree line, the true bias of the weave. Line your ruler up along that crease and trim off the triangular offcut; it can be saved for small pieces, patchwork, or a tiny zip pouch.
With the diagonal edge established, line up the ruler parallel to it, measuring the width of your strip from the edge. For double-fold binding, cut strips 2.5 centimetres wide for a slim finish or 4 centimetres for a chunkier look. Roll the fabric gently as you cut, keeping the ruler pressed down so nothing shifts. A 50-centimetre fat quarter yields about eight strips, each roughly 50 centimetres long, before you join them. Cut them all before you start sewing, since consistency is much easier to maintain in one sitting.
If you are working with a directional print, pay attention to how the motifs sit on each strip. Some makers prefer to cut the strips and then rotate every other one so the pattern travels around the project evenly. For a random scatter print, none of this matters, and you can simply stack the strips and join them as they fall.
Joining, Pressing, and Folding the Strips
Strips need to be joined end to end at right angles, with right sides together and the raw edges aligned. Place two strips perpendicular to each other, forming an L shape, and sew a diagonal line from the top left corner of the upper strip to the bottom right corner of the lower one. This diagonal seam distributes the bulk and keeps the strip lying flat when you pull it straight. Trim the seam allowance back to about 6 millimetres, snip the corner off, and press the seam open.
Continue joining strips until you have one long tape. Some sewists trim the seams with pinking shears to reduce bulk, which is a tidy trick for lighter fabrics. If you belong to a sewing circle, swap a few joined strips with a mate; sharing the load means you each end up with metres of binding in the colours you actually want, and the conversation over tea and bickies in the arvo tends to be the best part of the month. The community workshops running through many local libraries are another easy way to pick up the rhythm if you would rather watch someone do it first.
Once the full length is joined, press the entire strip in half lengthwise, wrong sides together, so the raw edges meet. This is single-fold binding, ideal when you want a flatter finish or plan to attach it with a two-step method. For the classic double-fold look, fold the strip in half again so the raw edges are tucked inside, then press once more. Run a hot iron along the length without dragging, and the strip will sit obediently while you pin it to your project.
Storing, Caring for, and Using the Binding
A freshly pressed strip can be wound into a small flat bundle or wrapped around a piece of cardboard, labelled with the fabric name and the finished width. Storing it this way prevents creasing and makes the binding easy to pull from as you sew. Keep it in a dry drawer or a shoebox with a few sachets of lavender, which suits Australian wardrobes better than plastic in our humid summers. If you have made a generous length, store half in your project bag and the rest in the stash, ready for the next make.
When you are ready to use it, attach the binding to the raw edge with right sides together, sewing along the first fold line. Flip it over, tuck the raw edge under, and topstitch from the right side to catch the underside. Take your time around the curves, easing the strip gently rather than stretching it, and pin generously on tighter bends like a keyhole neckline. A walking foot helps on slippery or very stretchy fabrics, but a regular presser foot usually manages quilting cotton without complaint.
Bias binding made this way washes up beautifully, softens a little with use, and wears in rather than wearing out. If you have caught the bug, the next natural step is to dye your own fat quarter before cutting, which opens up a whole world of custom colour. Have a look at this beginner-friendly guide for a relaxed intro to fabric dyeing at home, and let the freshly dyed cloth dry, press, and turn into binding just as you have done here.
If you found this walkthrough useful, you can find more fabric guides, pattern notes, and behind-the-scenes peeks over on the blog, along with longer video tutorials on the YouTube channel. Subscribe to the mailing list or follow along on Instagram for fresh project ideas, pop-up market dates around Melbourne and Sydney, and the occasional behind-the-scenes look at what is on the cutting table this week. Your fat quarters will not know what hit them.