If you're staring at a new pattern and feeling a bit stumped about what is a slip stitch in knitting, don't worry—you're definitely not alone. It's one of those terms that sounds like it might involve some complex finger gymnastics, but in reality, it's arguably the easiest "move" you'll ever learn in the craft. Honestly, if you can move a loop of yarn from one stick to another without dropping it, you've already mastered the basic mechanics.
The beauty of the slip stitch is that it's a bit of a secret weapon. It's used to create everything from those perfectly crisp, professional-looking edges on scarves to intricate, multi-colored patterns that look like they took ten times more effort than they actually did. Let's break down what's actually happening when you slip a stitch and why you'll want to keep this technique in your back pocket.
The Bare Bones: What Does "Slipping" Actually Mean?
At its most basic level, slipping a stitch means you are moving a stitch from your left-hand needle to your right-hand needle without actually knitting or purling it. You aren't adding any new yarn to that specific loop; you're just letting it hang out for a row.
Think of it like skipping a step while walking up the stairs. You're still moving forward, but that one particular step (or stitch) stays exactly as it was. Because you aren't working the stitch, it ends up being taller than the stitches around it. It essentially stretches across two rows of height instead of one. This might sound like a recipe for a mess, but when done intentionally, it creates structure, texture, and some pretty cool visual effects.
Purlwise vs. Knitwise: Which Way Do You Go?
This is where beginners usually get a little nervous. A pattern will often say something like "sl1 p-wise" or "sl1 k-wise." If it doesn't specify, there's a general rule of thumb that almost every knitter follows.
Slipping Purlwise (The Default)
Unless your pattern tells you otherwise, you should almost always slip the stitch purlwise. This means you point your right needle into the stitch just like you were going to purl it, but then you just slide it over.
Why purlwise? Because slipping it this way doesn't twist the stitch. It keeps the "legs" of the stitch sitting correctly on the needle so that when you finally do knit it on the next row, it looks smooth and flat. If you're just trying to move a stitch or create a neat edge, purlwise is your best friend.
Slipping Knitwise
You'll usually only slip knitwise when you're doing a decrease, like the "SSK" (Slip, Slip, Knit). When you slip knitwise, you're intentionally twisting the base of the stitch. If you do this by accident when you aren't supposed to, you might notice a tiny, tight little knot-looking thing in your fabric later on. It's not the end of the world, but it can make your knitting look a bit "off" if you do it consistently where it's not intended.
Where the Magic Happens: Why We Use Slip Stitches
You might be thinking, "Okay, so I'm just moving yarn around. Why bother?" Well, the slip stitch is actually the workhorse of the knitting world. Here are a few ways it makes your projects look a million times better.
1. The Famous "Neat Edge"
Have you ever knitted a scarf and noticed the edges look a bit bumpy or loopy? It's a common struggle. The easiest fix in the world is to slip the first stitch of every row. By slipping that first stitch (usually purlwise with the yarn in front), you create a beautiful, braided-looking edge that looks like it came straight from a high-end boutique. It keeps the sides of your work firm and prevents that wonky, "homemade" look that plagues so many first-time projects.
2. Mosaic Knitting (Color Without the Stress)
If you love the look of Fair Isle or multi-colored sweaters but hate the idea of carrying two strands of yarn at once and getting them all tangled, slip stitches are your answer. This is called Mosaic Knitting.
The concept is genius: you work with only one color at a time for two rows. To get the other color into the pattern, you simply slip the stitches from the row below. It creates these complex, geometric designs that look incredibly professional, but since you're only ever "working" one strand of yarn, the tension stays even and your sanity stays intact.
3. Adding Texture and Strength
Slip stitches make the fabric denser and less stretchy. This is why you'll almost always see them in the heel flap of a sock. By slipping every other stitch on the right-side rows, you create a thick, cushioned fabric that can handle the friction of being rubbed against the back of a shoe. It's practical, durable, and adds a nice little "ribbed" texture to the heel.
Let's Talk About the Yarn: Front or Back?
One thing that often trips people up when they're learning what is a slip stitch in knitting is where to put the "working yarn" (the stuff attached to the ball).
- wyib (With Yarn in Back): This is the most common. You keep your yarn at the back of the work, slip the stitch, and then keep going. This hides the "float" (the little bridge of yarn) behind the stitch so it's invisible on the front.
- wyif (With Yarn in Front): Sometimes, a pattern wants you to see that little bridge of yarn. If you slip with the yarn in front, you'll get a small horizontal bar of yarn sitting across the face of your stitch. This is used in decorative stitches like the Linen Stitch, which looks almost like woven fabric rather than knitting.
It's worth double-checking your pattern for these abbreviations. If you accidentally slip with the yarn in front when it should have been in back, you'll see a weird little line across your work. It's a quick fix, though—just tink back (un-knit) and move the yarn!
Common Mistakes and How to Avoid Them
Even though it's a simple move, there are a few ways things can go a bit sideways. The most common issue is tension.
Because a slipped stitch is "stretching" to cover the height of two rows, it can sometimes pull the fabric tight. If you're doing a lot of slip stitches—like in a mosaic pattern—make sure you aren't yanking the yarn too hard when you move to the next "active" stitch. You want that little bridge of yarn on the back to have enough slack to let the fabric lay flat. If it's too tight, your knitting will start to pucker and look like a raisin.
Another tip? Don't overthink it. It really is just a "slide and go" situation. Sometimes we get so used to the rhythm of knit-purl-knit-purl that our brains refuse to believe we can just skip one. Trust the process!
Why Every Knitter Should Love This Stitch
Honestly, mastering the slip stitch is like leveling up in a video game. It opens the door to socks, professional-grade garments, and colorwork that would otherwise be pretty intimidating. It's the difference between a scarf that looks like a beginner made it and a scarf that people ask, "Where did you buy that?"
So, the next time you see "sl1" in a pattern, don't sweat it. Just slide that stitch over, keep your yarn where it needs to be, and enjoy the texture you're creating. Whether you're reinforcing a sock heel or creating a wild geometric blanket, the humble slip stitch is going to be your new best friend. It's simple, it's effective, and it's one of those little details that makes knitting such a satisfying craft to dive into. Happy knitting!