Sl1wyif & Sl1wyib

Small movements that make a big visual difference

Slipping a stitch with yarn in front (Sl1wyif) or with yarn in back (Sl1wyib) might look like tiny instructions in a pattern—but they have a big impact on your finished fabric.

These techniques are used to create clean edges, textured patterns, reinforced fabric, and decorative stitch effects. And the only difference between them? Where your yarn sits when you slip the stitch.

Once you understand that placement, everything clicks.

Why You’ll Love Slipped Stitches

• Add texture without extra stitches
• Create crisp, clean edges
• Strengthen fabric
• Used in ribbing, mosaic knitting, and heel flaps
• Simple to execute once you know yarn placement

They’re subtle, but incredibly powerful.

What Do They Mean?

• Sl1wyif = Slip 1 stitch with yarn in front
• Sl1wyib = Slip 1 stitch with yarn in back

In both cases, you slip the stitch purlwise unless otherwise stated.

The yarn placement determines what the stitch does visually and structurally.

How to Work Sl1wyif

1. Bring yarn to the front of your work (as if to purl).
2. Insert your right needle into the next stitch purlwise.
3. Slip the stitch from the left needle to the right needle without knitting it.

The yarn travels across the front of the slipped stitch.

What It Does:

• Creates horizontal floats on the front of the fabric
• Common in mosaic knitting
• Often used in ribbing transitions
• Adds decorative texture

How to Work Sl1wyib

1. Keep yarn in the back of your work (as if to knit).
2. Insert your right needle into the next stitch purlwise.
3. Slip the stitch without knitting it.

The yarn stays behind the stitch.

What It Does:

• Reinforces fabric (like heel flaps in socks)
• Creates vertical stitch elongation
• Adds subtle texture
• Keeps fabric tidy and structured

Why Yarn Position Matters

The yarn placement determines where the float sits:

• Yarn in front → visible strand across the stitch
• Yarn in back → hidden strand behind the stitch

That single detail changes the look, density, and stretch of the fabric.

Where You’ll See These Used

• Heel flaps in socks
• Slip stitch rib patterns
• Mosaic knitting
• Decorative edges
• Structured brims
• Textured stitch patterns

They’re foundational for many “advanced-looking” textures.

Tips for Success

• Always slip stitches purlwise unless specified
• Don’t pull the yarn too tightly — floats need space
• Keep tension even for clean texture
• Pay attention to yarn placement before you move the needle

If something looks off, check your yarn position first. That’s usually the culprit.

Add Them to Your Stitch Toolkit

Sl1wyif and Sl1wyib are simple techniques that quietly transform fabric. They’re easy to learn, endlessly useful, and once they become muscle memory, you’ll start recognizing them everywhere.

Happy knitting