What the M1 stitch does and why you need it

The M1 (make-one) stitch is a way to add a new stitch to your needle without creating a visible hole in your fabric. You do this by picking up the horizontal strand of yarn that runs between two stitches on your needle, then knitting into it. The result is a stitch that blends seamlessly into your work, making it the standard increase for shaping garments like sweaters, hats, and sleeves where you want the shaping to be nearly invisible.

The M1 differs from other increases like yarn overs (which deliberately create a decorative hole) or knit-front-and-back (which leaves a small bump). When you need to add stitches for a fitted neckline, tapered sleeve, or waist shaping, M1 is what most patterns call for because it distributes the new stitch evenly across your work.

Key Takeaways

  • The M1 stitch is worked by picking up the strand between two stitches and knitting into it, creating a new stitch with no visible hole.
  • M1L (left-leaning) and M1R (right-leaning) are the two directions, and patterns specify which one to use based on where the increase sits.
  • The direction you pick up the strand determines which way the new stitch leans, so reading your pattern carefully matters.
  • M1 increases are worked between existing stitches, not at the edges of your work, and they pair well with decreases for shaping.

How to work M1L (left-leaning increase)

M1L stands for make-one left, and it creates a stitch that leans slightly to the left. To work it, insert your left needle from front to back under the horizontal strand that sits between the stitch you just worked and the next stitch on your right needle. This strand runs horizontally across your work.

Once you have the strand on your left needle, knit into it through the back loop. Knitting through the back loop (rather than the front) twists the new stitch so it sits flat and doesn't create a hole. You now have a new stitch on your right needle, and the increase is complete. The left-leaning direction makes M1L useful on the left side of a garment when you want the shaping to slope inward.

How to work M1R (right-leaning increase)

M1R stands for make-one right, and it creates a stitch that leans slightly to the right. Insert your left needle from back to front under the same horizontal strand between stitches. The difference is the direction you approach it from: back to front instead of front to back.

Knit into this strand through the front loop (the normal way). Because you picked it up from the back, knitting through the front automatically twists it the right way. M1R is the mirror image of M1L and is used on the right side of a garment to create a matching, symmetrical shaping line.

When your pattern says M1 without specifying left or right

Some patterns straightforward write "M1" without the L or R designation. In these cases, the direction usually does not matter for the overall look of the garment, or the pattern is designed so that one direction is standard throughout. You can choose either M1L or M1R and work consistently.

However, if your pattern shows a schematic or photo with visible shaping lines, look at which direction those lines lean. That tells you which version to use. When in doubt, M1R is the most common default, so starting with that is a safe choice.

Picking up the strand correctly

The strand you pick up must be the one that runs horizontally between the stitch you just worked and the next stitch waiting on your right needle. It is straightforward to accidentally grab the wrong strand, especially if you are working quickly. Slow down and look at your needle: you should see a clear horizontal line of yarn sitting between two vertical stitches.

If you pick up a strand that is too far to the left or right, you will create a gap or a twisted stitch. Practice picking up the strand a few times on scrap yarn before working M1 increases on a project you care about. Once your hands learn the motion, it becomes automatic.

Pairing M1 increases with decreases for balanced shaping

Most shaping patterns use M1 increases on one side and a matching decrease (like SSK or K2tog) on the other side. This keeps your stitch count stable while creating a tapered or fitted shape. If your pattern calls for an M1 increase on the right side of a sleeve, it usually calls for a decrease on the left side, and vice versa.

The increases and decreases should be the same distance from the edge so the shaping looks symmetrical. A typical sleeve cap might have an M1 increase one stitch in from the right edge and a decrease one stitch in from the left edge, worked on the same row. This creates a clean, professional-looking taper.

Common mistakes and how to avoid them

The most frequent error is forgetting to knit through the back loop on M1L, which leaves a hole instead of creating a seamless stitch. Remember: M1L goes in from front to back and knits through the back loop. M1R goes in from back to front and knits through the front loop. The direction you pick up the strand and the loop you knit through work together to twist the new stitch correctly.

Another mistake is picking up a strand that is too loose or too tight. If the strand is slack, your new stitch will be loose and uneven. If you pull too hard while picking it up, you will distort the stitches on either side. Use a gentle, steady tension and let the strand sit naturally on your needle before you knit into it.

Frequently Asked Questions

Can I use M1 at the very edge of my work?

No. M1 is worked between two existing stitches, so you need at least one stitch on each side of the strand you are picking up. For edge increases, use knit-front-and-back or yarn overs instead. M1 is for shaping in the interior of your fabric.

What if I cannot see the strand between stitches?

The strand is there, but your tension or yarn color might make it hard to spot. Try tilting your needle toward the light or using a stitch marker to point to the spot between two stitches. Once you know where to look, you will find it every time. If your yarn is very dark, a small flashlight can help.

Does M1 work the same way in purl rows?

Yes, the mechanics are identical. On a purl row, you still pick up the strand between stitches, but you purl into it instead of knitting. M1L on a purl row purls through the back loop, and M1R purls through the front loop. The direction and the loop you work through stay the same.

What is the difference between M1 and yarn over increases?

Yarn overs create a deliberate decorative hole and are often used in lace patterns. M1 creates no hole and is used for invisible shaping. If your pattern shows a solid fabric with fitted shaping, use M1. If it shows a lacy or openwork design, yarn overs are what you need.