What an Infinity Scarf Is and Why It's a Good First Project

An infinity scarf is a loop of knitted fabric with no beginning or end — you wear it by wrapping it around your neck twice, and the seam stays hidden at the back. It's one of the easiest scarves to knit because you knit a long rectangle, then sew the two short ends together. You don't have to worry about binding off neatly or finishing edges, and the garter stitch (the bumpy texture you get by knitting every row) hides beginner mistakes better than smoother stitches do.

Most infinity scarves take between 8 and 15 hours of actual knitting time, depending on how thick your yarn is and how fast you work. You'll need only two needles, one ball of yarn, and a yarn needle to sew the seam — no special tools or techniques.

Key Takeaways

  • An infinity scarf is a rectangle of garter stitch sewn into a loop, which means you avoid binding off and finishing edges.
  • You'll need size 10 or 11 needles and worsted-weight yarn (medium thickness), which are forgiving materials for beginners.
  • Cast on 20 to 24 stitches and knit every row until your rectangle is roughly 60 inches long and 8 inches wide.
  • Sew the two short ends together with a yarn needle using mattress stitch, which creates an invisible seam.
  • The whole project takes 8 to 15 hours depending on yarn thickness and your knitting speed.

Choosing Yarn and Needles for Your First Infinity Scarf

Pick worsted-weight yarn in a light color — worsted is the medium thickness you see in most beginner patterns, and light colors make it easier to see your stitches and spot mistakes. Avoid dark colors and fuzzy yarns (like mohair or eyelash yarn) because you won't be able to see what you're doing. A single ball of worsted-weight yarn (usually 200 yards or more) is enough for one infinity scarf.

Match your needles to your yarn. The yarn label will say something like "Use size 8–10 needles." Pick size 10 or 11 — slightly larger needles than the label suggests. Larger needles create looser, more forgiving stitches that are easier to fix if you drop one. You can use straight needles (the kind with a point on one end and a knob on the other) or circular needles (a loop of cable with a needle point on each end). Circular needles are easier to hold for a long project because the weight of the yarn rests in your lap instead of pulling on your wrists.

Casting On and Starting Your Rectangle

Cast on 20 to 24 stitches using the long-tail cast-on or the straightforward cast-on — whichever you learned first. If you haven't learned either, the straightforward cast-on is faster to teach yourself: make a loop, pull yarn through it, tighten, and repeat until you have enough stitches on the needle. Twenty stitches will give you a scarf about 8 inches wide, which is a comfortable width to wrap twice around your neck.

Once you have your stitches on the needle, knit the first row by inserting your needle through the first stitch from left to right, wrapping yarn around the needle, and pulling it through to create a new stitch. Slide the old stitch off the left needle. Repeat across the entire row. When you reach the end, turn the needle around and knit the next row the same way. You are now knitting garter stitch — the bumpy texture that comes from knitting every single row.

Keep knitting row after row. Don't worry about tension (how tight your stitches are) — garter stitch forgives loose and tight stitches equally. If you drop a stitch, pick it up with a crochet hook or your needle and keep going. Small mistakes disappear in the texture.

Knowing When Your Rectangle Is Long Enough

Measure your knitting against a ruler or measuring tape as you go. You want a rectangle that is roughly 60 inches long and 8 inches wide. Sixty inches is long enough to wrap around your neck twice with a comfortable overlap. If your yarn is thicker than worsted weight, you may only need 50 inches. If it's thinner, you may need 70 inches — the goal is a loop that goes around your neck twice without being too loose or too tight.

Count your rows as a rough guide: garter stitch in worsted weight on size 10 needles usually takes about 60 to 80 rows to reach 60 inches in length. Every few rows, lay your work flat on a table and measure it with a tape measure. When you reach 60 inches, you're ready to bind off.

Binding Off and Preparing to Sew

Binding off locks your stitches so they don't unravel. Knit two stitches, then use your left needle to lift the first stitch over the second stitch and off the needle. Knit one more stitch, lift the previous stitch over it, and repeat across the row. When one stitch remains, cut your yarn 6 inches from the needle, pull the tail through the last stitch, and tighten it.

You now have a rectangle with a cast-on edge at one end and a bound-off edge at the other. Thread your yarn needle (a blunt needle with a large eye) with the 6-inch tail you just cut. This tail will help you sew the seam. If the tail is too short, thread a new length of yarn into the needle instead.

Sewing the Seam with Mattress Stitch

Lay your rectangle flat. Bring the two short ends together so the cast-on edge meets the bound-off edge. You're about to sew them together with mattress stitch, which creates an invisible seam by stitching between the bumps on the edge of garter stitch.

Insert your needle under the first bump on the cast-on edge (the horizontal line of yarn between the first and second stitch). Pull the yarn through, then insert the needle under the first bump on the bound-off edge directly across from it. Pull the yarn through. Go back to the cast-on edge and insert the needle under the next bump up. Alternate between edges, going up one bump at a time. Pull the yarn snug every few stitches so the seam closes without gaps.

Keep sewing until the two edges are completely joined. Weave the yarn tail through a few stitches on the inside of the scarf to find it, then trim the excess. Your infinity scarf is now complete — try it on by wrapping it around your neck twice.

Common Mistakes and How to Fix Them

The most common mistake is knitting too tightly, which makes your hands hurt and slows you down. If your stitches feel hard to move on the needle, relax your grip and let the yarn flow more loosely through your fingers. Tight stitches also make the finished scarf stiff instead of drape-y.

The second mistake is accidentally dropping stitches without noticing. If you see a hole in your work, stop and pick up the dropped stitch with a crochet hook before it unravels further. Insert the hook through the hole from front to back, catch the horizontal strand of yarn above it, and pull it through the stitch. Repeat for each row the stitch was dropped.

The third mistake is sewing the seam too loosely, which leaves gaps. Pull the yarn snug as you sew, but not so tight that you pucker the fabric. If your seam has gaps after you finish, you can go back and tighten it by pulling the yarn tail.

Frequently Asked Questions

What if I run out of yarn before the scarf is long enough?

You can join a new ball of yarn by tying the old tail to the new yarn with a square knot, then weaving the tails into your work later. Tie the knot close to your needle so the knot sits inside the scarf where it won't show. If you're close to 60 inches, you can bind off early — a slightly shorter infinity scarf still works fine.

Can I use a different stitch instead of garter stitch?

Yes, but garter stitch is the easiest for beginners because it looks the same on both sides and hides mistakes. Stockinette stitch (knit one row, purl one row) creates a smoother look but shows every error. Save stockinette for your second or third project.

How do I fix a hole in the middle of my scarf?

If you notice a hole after you've finished knitting, use a crochet hook to pick up the dropped stitch and pull it up through each row above it. Once the stitch is back on the needle, knit it closed by working a few rows. If the hole is very large, you may need to unravel back to that point and reknit.

What yarn weight should I use if I want a thicker scarf?

Use bulky-weight yarn (the thickest common yarn) on size 15 needles. Bulky yarn knits much faster — you'll finish in 4 to 6 hours instead of 15. You'll need about 150 yards, which is less than worsted weight, so check the yardage on the label before you buy.

Do I have to use mattress stitch to sew the seam?

Mattress stitch creates the invisible seam, but you can also use a straightforward whip stitch if you prefer — it's faster but slightly more visible. Insert the needle through both layers of fabric at the edge and pull the yarn snug. The seam will show a little, but many knitters like that look.