What M1L Does and When to Use It

M1L stands for "make one left" and is a way to add a new stitch to your needle by lifting the horizontal strand of yarn between two stitches and knitting into it. The "left" refers to the direction the new stitch leans — it slants to the left when you look at your finished fabric. You use M1L when a pattern calls for an invisible increase that blends into your knitting, or when you need the new stitch to lean a particular direction for shaping that looks balanced.

M1L pairs with its mirror, M1R (make one right), which leans the opposite way. Patterns often use both increases on the same row — M1L on the left side of a garment and M1R on the right side — so the shaping looks symmetrical. If a pattern just says "M1" without specifying left or right, check the surrounding instructions or the pattern notes to see which one is intended.

Key Takeaways

  • M1L creates a new stitch by lifting the strand between two existing stitches and knitting through it from back to front.
  • The new stitch leans left in your finished fabric, making it useful for balanced shaping on the left side of a garment.
  • You work M1L between two stitches, not into a stitch itself, so it does not replace an existing loop.
  • The increase is nearly invisible because the new stitch comes from the yarn already on your needles, not from a yarn-over or other obvious method.

Step-by-Step: How to Work M1L

Step 1: Position your needles. Knit to the point where the pattern tells you to make the increase. You will work M1L in the space between the stitch you just knitted and the next stitch on your left needle. Stop and look at the horizontal strand of yarn running between these two stitches — that is what you are about to lift.

Step 2: Insert your left needle. From front to back, slide your left needle under that horizontal strand, going from left to right. The strand should sit on your left needle with the working yarn side facing away from you. This is the opposite direction from how you normally insert your needle into a stitch.

Step 3: Knit through the back loop. With your right needle, knit into the lifted strand, but go through the back loop instead of the front. This twist is what creates the left-leaning stitch. Bring your yarn through as you would for a normal knit stitch, and slip the loop off your left needle. You now have a new stitch on your right needle.

The whole move takes about three seconds once you have done it a few times. The key is remembering to insert your left needle from front to back (the opposite of normal) and to knit through the back loop of the lifted strand.

Common Mistakes and How to Avoid Them

Inserting the needle the wrong direction. The most frequent error is inserting your left needle from back to front instead of front to back. If you do this, you will create an M1R (right-leaning) stitch instead of an M1L. The fix: before you knit, double-check that the strand is sitting on your needle with the working yarn side facing away from you. If it is facing toward you, slip it off and reinsert from the correct direction.

Knitting through the front loop instead of the back. If you knit through the front of the lifted strand, the new stitch will twist the wrong way and may look loose or uneven. Always knit through the back loop — this is the step that makes the stitch lean left. If you forget and knit the front, your fabric will still work, but the increase will be visible and may not match the pattern's intended shaping.

Pulling too tight. When you knit the lifted strand, the yarn can feel thin or hard to work with. Do not pull hard — let the stitch form naturally. If you yank the yarn, the new stitch will be tight and the stitches on either side may become distorted. A gentle, even tension makes the increase blend in.

M1L in Different Stitch Patterns

In stockinette stitch (knit on the right side, purl on the wrong side), M1L is nearly invisible because the new stitch matches the surrounding stitches. The increase sits flat and does not draw attention.

In garter stitch (knit every row), M1L is slightly more visible because every stitch is a bump, but the increase still blends reasonably well. The new stitch will be a small horizontal line between the bumps on one row, then disappear into the pattern on the next row.

In ribbed patterns, work M1L between the stitches as usual, but pay attention to whether the new stitch should be a knit or a purl to keep the rib pattern balanced. If you are increasing between a knit and a purl stitch, the new stitch is usually a knit, but check your pattern instructions.

M1L Versus M1R: Choosing the Right One

M1L leans to the left, and M1R leans to the right. In a symmetrical pattern — like increasing on both sides of a sleeve cap — you use M1L on the left edge and M1R on the right edge. This makes the shaping look balanced and intentional.

If a pattern says to work M1 without specifying left or right, look at the surrounding increases. If increases are happening on both sides of the garment, use M1L on the left and M1R on the right. If the pattern is asymmetrical or only increases on one side, the pattern notes will usually clarify which one to use. When in doubt, M1L is the more common default in modern patterns.

Practicing M1L on a Swatch

Before you work M1L on a project, practice on a small swatch so the motion becomes automatic. Cast on 10 to 15 stitches and knit a few rows in stockinette stitch. Then knit across a row, working M1L between every other stitch. You should end with more stitches than you started with. Knit several more rows and look at how the increases sit in your fabric.

Once you have done M1L five or six times, the motion will feel natural. Your hands will remember to insert the needle from front to back and to knit through the back loop. At that point, you can move on to a real project with confidence. If you make a mistake on your swatch, it does not matter — that is what swatches are for.

Frequently Asked Questions

What is the difference between M1L and a yarn-over increase?

A yarn-over creates a visible hole in your fabric because you are wrapping yarn around the needle without knitting a stitch. M1L uses yarn already on your needles, so there is no hole. M1L is invisible; a yarn-over is decorative. Use M1L when you want the increase to blend in, and a yarn-over when the pattern calls for a lacy or textured effect.

Can I work M1L on the edge stitch of my knitting?

M1L works best between two stitches in the middle of your row because you need a horizontal strand to lift. On the very edge, there is no strand to lift, so you cannot work M1L there. If you need to increase at the edge, use a different method like knitting twice into the same stitch or working a yarn-over.

What if I cannot see the horizontal strand between stitches?

The strand is easiest to see in light-colored yarn and harder in dark yarn. Tilt your needles toward a light source and look closely at the space between the two stitches. The strand runs horizontally. If you still cannot see it, gently spread the stitches on your needle with your fingers — this makes the strand more obvious.

Do I count the M1L stitch as a new stitch on my needle?

Yes. When you work M1L, you add one stitch to your needle. If your pattern says you should have 20 stitches after a row of increases, and you worked two M1L increases, you started with 18 stitches. Always count your stitches after a row with increases to make sure you have the right number.