What M1L Does and When to Use It

M1L stands for "make one left" and is a method of increasing stitches by creating a new loop from the horizontal strand of yarn between two stitches. 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 it, usually in shaping (like sleeve caps or raglan decreases) or in lace and textured designs where the direction of the increase matters for appearance.

M1L pairs with its counterpart, M1R (make one right), which leans the opposite direction. Patterns often alternate them to create balanced, symmetrical shaping. If your pattern just says "M1" without specifying left or right, check the pattern notes — some designers have a default, while others expect you to choose based on context.

Key Takeaways

  • M1L creates a new stitch by lifting the horizontal strand between two stitches and knitting it through the back loop.
  • The new stitch leans left in your finished fabric, which is why it pairs with M1R for balanced shaping.
  • You work M1L on the needle between stitches, not by working into an existing stitch.
  • Tension matters — keep the lifted strand loose enough that the new stitch doesn't pull the surrounding stitches tight.

The Basic Steps for M1L

Start with your working yarn on the right side of your needles, ready to knit. Identify the two stitches where you need to increase — the stitch you just worked and the next stitch on your left needle. Look at the horizontal strand of yarn that runs between these two stitches on the row below.

Insert your left needle from front to back under that horizontal strand, lifting it onto your needle. You should now have a new loop on your left needle, sitting between your working stitches. This loop is not yet a finished stitch — it is just the raw strand.

Knit this lifted strand through the back loop. This is the critical step: you must knit through the back loop, not the front. Knitting through the back loop twists the stitch and creates the left-leaning appearance. If you knit through the front loop instead, you will create a right-leaning stitch (which is M1R). Pull the yarn snug but not tight, and slide the new stitch off your left needle.

You have now completed one M1L increase. Your stitch count has gone up by one, and the new stitch sits between the two original stitches.

Common Mistakes and How to Avoid Them

The most frequent error is knitting through the front loop of the lifted strand instead of the back loop. This reverses the direction of the lean. To catch this before you go too far, look at the stitch you just made — it should slant to the left. If it slants right, you worked M1R by accident. On the next row, you can tink back (undo stitches one at a time) and correct it, or note the mistake and work M1R where you meant M1L to balance it out later.

Another common problem is pulling the lifted strand too tight. This pinches the stitches on either side and creates a visible hole or tight spot. The lifted strand should feel loose and relaxed as you pick it up. Let your tension ease slightly as you work the new stitch, then return to normal tension for the next stitch.

Some knitters accidentally skip the lifted strand and knit into the stitch on the needle instead. This does not create an increase — you end up with the same stitch count. If this happens, you will notice you are one stitch short by the end of the row. Go back and pick up the missed strand, or add a stitch using a different method and note it for future reference.

M1L in Different Knitting Contexts

In shaping (sleeves, necklines, armholes), M1L and M1R are often worked one stitch in from the edge. A pattern might say "K1, M1L, knit to last 2 stitches, M1R, K1." This creates a balanced increase on both sides of the piece. The single knit stitch before and after the increase creates a neat selvage edge.

In lace patterns, M1L and M1R are paired with yarn overs and decreases to create the open, decorative look. The direction of the increase matters because it affects how the pattern reads visually. Reversing M1L and M1R in a lace design will throw off the symmetry.

In textured stitches like cables or brioche, M1L may appear less often, but when it does, it usually sits at a seam line or edge where the direction of the increase is less visible. Always check your pattern to see whether the direction matters for your specific design.

M1L Versus Other Increase Methods

M1L is different from a yarn over, which creates a deliberate hole by wrapping yarn around the needle. M1L creates a closed increase — no hole. It is also different from knit front and back (KFB), which works into the same stitch twice. KFB is faster but creates a visible bump and leans right by default. M1L is neater and gives you control over the direction.

M1L is also distinct from lifted increases, where you pick up a stitch from a previous row and knit it. Lifted increases are faster and create less bulk, but they sit higher on the fabric and are more visible. M1L sits right at the working row and blends in better, especially in stockinette stitch.

Practice Tips for Smooth M1L

Start by practicing M1L on a swatch in a straightforward stockinette stitch (knit on right-side rows, purl on wrong-side rows). Cast on 20 stitches and work a few rows plain. On the next row, work M1L between every other stitch across the row. This gives you multiple chances to practice the motion in one row and shows you when ready whether you are getting the direction right.

Pay attention to your needle angle as you pick up the strand. Inserting from front to back (not back to front) is what creates the left lean. If you are unsure, pick up the strand both ways on a practice swatch and compare the results. The visual difference will make the technique stick.

Once you are comfortable with the motion, try M1L in a real project. Shaping rows are a good place to start because the increases are usually spaced out and straightforward to count. Lace patterns come later, once the motion is automatic.

Frequently Asked Questions

What is the difference between M1L and M1R?

M1L creates a stitch that leans left, while M1R creates one that leans right. Both increase by one stitch using the horizontal strand between stitches. The difference is which direction you insert your needle and which loop you knit through. M1L: insert front to back, knit through back loop. M1R: insert back to front, knit through front loop.

Can I use M1L if the pattern just says M1?

Check the pattern notes first — many designers specify a default. If the pattern does not say, M1R is the most common default in English-language patterns. However, if you are working a symmetrical piece and need increases on both sides, using M1L on one side and M1R on the other creates better balance than using the same increase twice.

What if I pick up the strand from the wrong side?

If you insert your needle from back to front instead of front to back, you will create an M1R (right-leaning stitch) instead of an M1L. The stitch will still be a valid increase, but it will lean the wrong direction. If you notice before moving on, tink back and redo it. If you catch it later, you can work the opposite increase elsewhere to balance it out.

Does M1L create a hole in the fabric?

No. M1L is a closed increase — it does not leave a hole. If you see a hole, you may have accidentally worked a yarn over instead, or the lifted strand was not secured properly. A correctly worked M1L blends into the fabric and is barely visible in stockinette stitch.

Can I work M1L on the purl side of the fabric?

Yes. On a purl row, you work M1L the same way — pick up the horizontal strand from front to back and purl through the back loop. The stitch will still lean left in the finished fabric, even though you are working from the wrong side.