Cast off by threading yarn through your loops, then pulling tight

Casting off a loom knit scarf means securing the loops on your loom so they won't unravel when you remove the scarf. The most common method is the basic bind-off: you thread your yarn through each loop in order, pull them off the loom, and tighten the yarn to lock everything in place. This takes about five to ten minutes and works for any scarf you've knit on a round or rectangular loom.

The scarf is not finished until you cast off. Without this step, the moment you lift it off the loom, the stitches will drop and your work will come apart. Casting off is what turns loose loops into a stable edge.

Key Takeaways

  • The basic bind-off works by threading yarn through each loop from one direction, then pulling the loops off the loom and tightening the yarn to lock them.
  • You need a yarn needle (also called a tapestry needle) with an eye large enough for your yarn to pass through easily.
  • Work from one end of the scarf to the other in a single direction, pulling each loop through the next one before moving on.
  • Pull the final yarn tail tight and weave it into the edge of the scarf to hide it and prevent the cast-off from coming loose.

Gather your yarn needle and measure your yarn tail

Before you start, thread a yarn needle (a blunt needle with a large eye, also sold as a tapestry needle) with the working yarn still attached to your loom. The yarn should be long enough to thread through every loop on your scarf. A rough measure: if your scarf has 40 loops, you need at least 4 to 5 feet of yarn. If you're not sure, cut a tail longer than you think you need—you can always trim it later.

If your working yarn is too short, tie a new length of yarn to the end of the old one with a square knot, trim the knot close, and keep going. The knot will be hidden inside the cast-off edge.

Thread the needle through each loop in order

Starting at one end of the scarf, insert the needle through the first loop from front to back (or back to front—pick a direction and stay consistent). Pull the yarn through, leaving a small tail. Move to the next loop and repeat, threading the needle through each loop one at a time, moving along the length of the scarf.

Work slowly and keep the tension even. If you pull too hard, the loops will bunch up and the edge will pucker. If you pull too loose, the cast-off will be floppy. Aim for the same tension you used when knitting.

Pull each loop off the loom as you go

After you thread the needle through a loop, gently slide that loop off the peg or pin on the loom. The loop will now be held only by the yarn running through it. Continue threading the needle through the next loop, then slide that one off too. Work your way along the entire length of the scarf, threading and removing loops in sequence.

If a loop starts to slip before you thread the next one, don't panic—just push it back onto the peg temporarily and keep working. Once you've threaded the yarn through it, it won't come loose.

Tighten the yarn to lock the cast-off edge

When you reach the last loop, pull the yarn tail firmly so all the loops cinch tight. This locks them in place. Pull hard enough that the edge feels snug and the loops can't slide, but not so hard that you distort the shape of the scarf. The edge should look like a neat row of small bumps.

Once the yarn is tight, weave the tail through the edge of the scarf using the yarn needle, going in and out of the cast-off loops and the body of the scarf for about 2 inches. This anchors the tail so it won't come loose and unravel the edge. Trim any excess yarn close to the scarf.

Check both edges and weave in any other loose ends

Look at the cast-off edge from both sides. It should be even and tight, with no loops sticking out or gaps between stitches. If one spot looks loose, you can gently tighten it by pulling the yarn tail from that area—but be careful not to pull so hard that you distort the rest of the edge.

If you have a yarn tail at the other end of the scarf (where you cast on), weave that in too using the same method: thread it through the edge stitches for a couple of inches, then trim it. A scarf with both ends secured will hold up through many washes and wears.

Frequently Asked Questions

What if I pull too hard and the cast-off edge puckers?

You can usually fix this by gently stretching the edge while it's still damp. Wet the scarf lightly, lay it flat, and gently pull the puckered edge to even it out. Let it dry in that position. If the damage is severe, you can cut the cast-off edge off and redo it, though this requires some care to avoid dropping stitches.

Can I cast off a loom knit scarf without a yarn needle?

Not easily. A yarn needle is the right tool because its blunt tip won't split the yarn. You could use a small crochet hook to pull loops through each other, but a yarn needle is faster and gives a neater result. They cost a few dollars and last forever.

What happens if I don't weave in the yarn tail after casting off?

The cast-off edge may come loose over time, especially if the scarf gets pulled or washed. Weaving the tail in takes two minutes and prevents this. It's worth doing.

Do I cast off the same way on a round loom and a rectangular loom?

Yes. The basic bind-off works the same way on any loom. The only difference is that on a round loom you'll work your way around the circle, and on a rectangular loom you'll work along the length. The technique is identical.