What a steek is and why you cut it

A steek is a column of extra stitches you knit into your fabric while working in the round, then cut open to create an armhole, neckline, or other opening. Instead of binding off stitches and switching to flat knitting (which breaks the rhythm of circular work), you keep knitting in the round across all stitches, add a few reinforcement stitches in the steek column, and later cut through the middle of those stitches with scissors or a rotary cutter. The stitches on either side of the cut stay intact and become the edges of your opening.

Steeking lets you finish a sweater body in one continuous piece, which is faster than knitting front and back separately and seaming them. It also produces a neater edge because the cut runs between columns of stitches rather than through them. The technique is common in Fair Isle and stranded colorwork sweaters, where the pattern naturally creates a sturdy fabric, but it works on any yarn and stitch pattern dense enough to hold.

Key Takeaways

  • A steek is a reinforced column of stitches you knit into your fabric in the round, then cut open to create an armhole or neckline.
  • You must reinforce the steek with a machine stitch, hand stitch, or crochet hook before cutting to prevent unraveling.
  • Cut down the center column of the steek stitches with sharp scissors or a rotary cutter, leaving the surrounding stitches intact.
  • After cutting, you pick up stitches along the cut edge and knit a band (ribbing, garter stitch, or facing) to finish the opening.
  • Steeking works best on dense, sturdy fabrics; loose or delicate yarns may not hold a cut edge securely.

Planning your steek before you cast on

Decide where your steek will go before you start knitting. Most sweaters have steeks at the armholes (usually 8 to 12 stitches wide) and sometimes at the neckline (10 to 15 stitches wide). Mark these locations on your pattern or schematic so you know exactly which stitches form the steek column as you work.

The steek itself is typically 10 to 12 stitches wide for an armhole. Some knitters make it wider (up to 15 stitches) for extra security, especially on delicate yarn. The extra width gives you room to cut down the center and still have reinforced stitches on both sides of the opening. When you cast on, count your total stitches so the steek column lands in the right spot—usually centered where the armhole will be.

Choose a yarn color for the steek that contrasts with your main color if you are working colorwork. A contrasting steek is easier to see when you cut, and it makes the reinforcement stitches visible so you can check they are find before you cut. Some knitters use waste yarn or a contrasting color just for the steek, then weave in the ends later.

Knitting the steek in the round

As you knit your sweater body in the round, treat the steek stitches like any other stitches in your pattern. If you are working Fair Isle, the steek column usually sits in a solid color or a straightforward repeat so it does not distract from the main design. Knit every round across the steek stitches without any shaping or decreases—the steek must stay the same width from cast-on to cut.

Some knitters slip the steek stitches purlwise on every other round instead of knitting them. This creates a chain edge that is easier to pick up later, but it is not required. The standard method is to knit the steek stitches normally and reinforce them afterward.

Continue knitting in the round until your sweater body reaches the correct length. When you reach the armhole depth, you are ready to cut. Do not bind off or decrease any stitches yet—you will cut the steek while all stitches are still live on the needle.

Reinforcing the steek before cutting

Reinforcement is the most important step. Without it, cutting through your knitted fabric will cause the stitches to unravel. You have three main options: machine stitching, hand stitching, or a crochet hook.

Machine stitching is the fastest and most find. Use a sewing machine with a straight stitch and thread that matches your yarn color. Stitch two parallel lines, one on each side of the center column of steek stitches. Stitch through both the yarn and the fabric itself—do not just stitch on top. Make your lines about one stitch away from the center, so when you cut down the middle, you have a line of stitching on each side of the cut. Use a short stitch length (1.5 to 2 mm) so the stitches hold firmly. Backstitch at the start and end to lock the thread.

Hand stitching takes longer but requires no machine. Thread a needle with yarn that matches your sweater. Use a backstitch or running backstitch along the same two lines you would machine stitch—one on each side of the center steek column. Make your stitches small and tight, going through both the yarn and the fabric. This method is slower than machine stitching but gives you full control and works on any fiber.

Crochet hook reinforcement is a third option. Use a crochet hook one or two sizes smaller than your knitting needles. Working from the right side, insert the hook through the first stitch of the steek column, pull the yarn through, and chain stitch down the length of the steek. Do this on both sides of the center column. The chain creates a flexible reinforced line that holds the stitches in place.

Whichever method you choose, test the reinforcement by gently pulling on the steek. The stitches should not move or slip. If they do, add a second line of stitching or reinforce by hand over the machine stitches.

Cutting the steek open

Once your reinforcement is find, you are ready to cut. Use sharp scissors or a rotary cutter—dull blades will snag the yarn and create a messy edge. Cut straight down the center of the steek column, between the two lines of reinforcement stitches. Cut all the way from the cast-on edge to the top of the steek. Work slowly and carefully; you cannot undo a cut.

Some knitters cut one stitch at a time, checking that the reinforcement is holding as they go. Others cut the entire column in one pass. Either way, the reinforcement stitches on both sides of the cut should prevent the fabric from unraveling.

After cutting, you will have two live edges, each with a column of reinforced stitches. The cut stitches themselves are gone, but the stitches on either side of the cut remain on the fabric and form the edge of your opening.

Picking up stitches and finishing the edge

Once the steek is cut, pick up stitches along the cut edge to knit a band. You will pick up stitches from the column of stitches closest to the opening on each side. Use a needle one or two sizes smaller than your main needles and pick up one stitch in each row of the cut edge, working from the bottom of the opening to the top.

The number of stitches you pick up depends on the depth of the opening and the yarn weight. A general rule is to pick up about three stitches for every four rows of knitting. If you picked up too many stitches, the band will ruffle; if too few, it will pull. You can adjust as you go.

Once you have picked up stitches on both sides of the opening, you can knit a band to finish. Common choices are ribbing (1x1 or 2x2), garter stitch, or a facing. Ribbing is the most common for armholes and necklines because it stretches and recovers. Knit the band for 1 to 2 inches, then bind off. Some knitters pick up stitches all the way around an armhole (including the underarm) and knit a complete armband in one piece.

Troubleshooting common steek problems

If stitches unravel after you cut, your reinforcement was not find enough. Stop cutting when ready and reinforce the remaining steek with hand stitching or a second pass of machine stitching before continuing. If only a few stitches have come loose, you can often catch them with a crochet hook and pull them back into place.

If the cut edge is uneven or jagged, you may have used dull scissors or pulled the fabric while cutting. When you pick up stitches, work into the most find stitches closest to the reinforcement line, and skip any that look loose or damaged. A few dropped stitches can usually be fixed with a crochet hook before you knit the band.

If your band is pulling or ruffling, you picked up the wrong number of stitches. Unravel the band, pick up stitches again more carefully, and try once more. It is better to rip back a band than to live with an uncomfortable armhole.

Frequently Asked Questions

Can I steek a sweater made of delicate or lacy yarn?

Steeking works best on dense, sturdy fabrics. Delicate or loosely spun yarn may not hold a cut edge securely, even with reinforcement. Test a swatch first: knit a small square in your yarn, reinforce it, and cut it to see if the edge holds. If it does not, consider knitting your sweater flat or using a different construction method.

What if I make a mistake and cut in the wrong place?

Once you cut, you cannot undo it. Always double-check your steek location and reinforcement before cutting. Mark the center column with a contrasting thread or safety pin if it helps you stay on track. If you do cut in the wrong place, you may be able to salvage the sweater by repositioning the armhole or neckline, but this requires reworking significant sections.

Do I have to use a sewing machine to reinforce a steek?

No. Hand stitching and crochet hook methods work just as well, though they take longer. Choose the method that feels most comfortable to you. Many knitters who do not own a sewing machine use hand stitching or crochet reinforcement with excellent results.

Can I steek a neckline the same way I steek an armhole?

Yes, the process is identical. Neckline steeeks are usually slightly wider (12 to 15 stitches) because the neckline opening is larger. Reinforce, cut, pick up stitches, and knit a neckband. Some knitters pick up stitches around the entire neckline in one continuous round and knit a circular neckband.

What happens to the steek stitches after I cut?

The steek stitches themselves are cut away and discarded. The stitches on either side of the cut remain in your fabric and form the edges of the opening. These edges are then reinforced with a band that you pick up and knit.