How to Sew a Blind Hem on a Sewing Machine

A blind hem creates a neat, almost invisible finish on trousers, skirts, dresses, curtains and other projects where a visible line of stitching would distract from the fabric. The stitches catch only a small amount of the garment’s outer layer, while the larger part of the stitch is hidden inside the folded hem allowance.

This technique is straightforward once the fabric is folded correctly and the machine is adjusted carefully. Whether you use a mechanical model from a local retailer or a computerised machine with several blind-hem settings, the same principles apply. A little preparation is especially useful when working with Australian fabrics, from lightweight cottons for summer clothing to heavier curtain materials found at Spotlight or Lincraft.

What a blind hem does

A blind hem secures a folded edge without producing a continuous visible seam on the right side. The machine makes a series of narrow stitches into the garment and wider zigzag-style bites over the folded edge. The small stitches are designed to blend into the fabric, while the fold supports the raw edge and prevents fraying.

Most modern sewing machines have a blind-hem stitch, usually shown as a broken vertical line beside a zigzag. Some models offer separate settings for stretch and woven fabrics. A stretch blind hem is useful for knit skirts or trousers, whereas a standard blind hem is usually better for woven cotton, wool, linen and polyester.

The result depends more on folding and alignment than on machine price. A basic machine with adjustable stitch width and a blind-hem foot can produce a professional finish. Before starting, check the instruction manual because the position of the guide and the recommended presser foot vary between brands.

Preparing the fabric and hem

Finish the raw edge before folding the hem. An overlocker, zigzag stitch, pinking shears or a clean turned edge can prevent fraying, particularly with loosely woven linen. Press the hem allowance first, following the pattern instructions. For garments, the allowance is commonly around 3–5 centimetres, while curtains may require a much deeper fold for weight and stability.

Turn the hem to the wrong side and press it firmly. Then fold the pressed hem back on itself so that only a narrow strip of the hem edge is exposed. The garment’s right side should face upwards, with the folded edge positioned close to the machine foot. The fold needs to be crisp and even from one end to the other.

Use a matching thread for the needle and bobbin. On dark navy or black fabric, a slightly softer shade can sometimes disappear better than a stark exact match. Test the setup on a scrap cut from the project, since the thickness, weave and colour can change how noticeable the blind stitches appear.

Setting up the sewing machine

Attach the blind-hem foot if your machine includes one. It normally has a vertical guide that sits against the fabric fold. Select the appropriate blind-hem stitch and begin with a moderate stitch length and narrow stitch width. The zigzag bite should reach the folded edge, while the straight stitches should remain on the hem allowance.

Lower the presser foot and turn the handwheel towards you to check the first few needle movements. The needle must enter the folded edge by only a thread or two. If it penetrates too far into the garment, the finished line will be obvious. If it misses the fold, the hem will not be secured.

Machine settings are only a starting point. Lightweight fabrics often need a shorter stitch and a narrower swing, while thick wool or denim may need a longer stitch and a wider setting. Reduce presser-foot pressure if the material shifts or stretches, provided your machine allows this adjustment. On a modern computerised model, save the selected settings if you expect to repeat the hem on several garments.

Sewing the blind hem

Begin on a hidden section of the hem and leave a short thread tail. Sew slowly, keeping the folded edge against the guide. Every few stitches, stop with the needle down and check that the zigzag point is catching the fold without taking a large bite from the garment.

Avoid pulling the fabric behind the presser foot. Let the feed dogs move it naturally, since stretching can cause uneven stitches or puckering. For a long curtain hem, support the weight of the fabric on a large table or ironing board. This is particularly helpful in smaller sewing rooms in Sydney or Melbourne apartments, where fabric can otherwise drag against the edge of the table.

When you reach the starting point, overlap the first few stitches and secure the seam. Remove the fabric carefully, then press the hem from the wrong side using the temperature suitable for the fibre. Turn the garment right side out and inspect the result in natural light. A good blind hem should appear as occasional tiny dots rather than a continuous row.

Troubleshooting and useful buying details

If the stitch is too visible, reduce the zigzag width or move the fabric fold slightly farther from the needle. If the hem is loose, increase the stitch length slightly or make sure the needle is consistently catching the fold. Wavy fabric may indicate excessive pressure, a blunt needle or stretching during sewing. Pressing the hem before and after stitching often resolves minor unevenness.

For knit fabric, use a ballpoint or stretch needle and test the elastic blind-hem setting. A narrow strip of lightweight interfacing can stabilise a soft edge. For thick fabrics, trim bulky seam intersections and use a fresh, suitably sized needle. Never force a thick fold beneath the presser foot, as this can damage the needle or disturb the machine timing.

When comparing machines in the Australian market, look for adjustable stitch width, stitch length, a compatible blind-hem foot and clear instructions. If considering a second-hand machine imported from overseas, arrange independent equipment checks before committing to a purchase, particularly when the listing provides little information about servicing or condition. Also confirm that the machine is suitable for Australia’s 230–240V electrical supply and includes an appropriate plug or approved adaptor.

A quick blind-hem checklist

• Finish the raw edge and press the hem allowance before folding.
• Use a scrap of the same fabric to test stitch width and needle position.
• Keep the fold against the blind-hem foot guide without stretching the fabric.
• Check that the needle catches only the edge of the fold.
• Press the completed hem from the wrong side and inspect it in natural light.
• Clean the machine after working with lint-producing fabrics such as wool or fleece.

A blind hem becomes much easier with repetition. Start with a stable woven fabric, sew at a controlled speed and make adjustments in small increments. With the right fold and a carefully tested setting, even an inexpensive sewing machine can produce a discreet finish suitable for everyday clothing, formal garments and home furnishings.