Circular needles let you knit seamless tubes and flat pieces without turning your work
A circular needle is two short needle tips connected by a flexible cable. Instead of working back and forth in rows, you knit continuously in a spiral, which means no seams to sew later and no need to flip your work. The cable lets you hold many more stitches than a straight needle, so circular needles work for everything from hats and socks to sweaters and blankets.
The basic motion is the same as with straight needles—you still insert, wrap, and pull through. The difference is that you move around the circle instead of turning at the end of each row. Your working yarn stays on the right side of the fabric the whole time, which takes some adjustment if you are used to turning your work.
Key Takeaways
- Circular needles come in different lengths (16 inches to 60 inches); choose the length based on how many stitches you are casting on, not the finished project size.
- Cast on all your stitches onto one needle tip, then slide them onto the cable before joining to knit in the round.
- Mark the beginning of your round with a stitch marker so you know where each round starts and ends.
- The most common mistake is twisting your cast-on stitches before joining; lay them flat on the cable and check that they all face the same direction.
- You can knit flat (back and forth) on circular needles too, which is useful when your stitch count is too high for straight needles.
Choose the right needle length for your stitch count
Circular needle length refers to the cable measurement, not the total length of the needle. Common sizes are 16 inches, 24 inches, 32 inches, and 60 inches. The rule is straightforward: your cast-on stitches should fit comfortably on the cable with a little room to move, but not so much room that they slide around loosely.
A 16-inch needle works for small projects like hats and the cuffs of socks—usually 60 to 80 stitches. A 24-inch needle handles 100 to 150 stitches. A 32-inch needle fits 150 to 250 stitches. A 60-inch needle (sometimes called a long circular) holds 250 stitches and up, and you can also use it for flat knitting on projects with a large stitch count. If your stitches are bunched too tightly, they will be hard to work into and may stretch out of shape. If they are too loose on the cable, they will slip off the ends.
Cast on and prepare to join
Cast on all your stitches onto the left needle tip using your usual cast-on method. For circular knitting, long-tail cast-on and cable cast-on are popular because they create a neat edge. Once all stitches are on the needle, slide them down onto the cable so they sit in the middle, away from both needle tips.
Before you join, lay the needle flat on a table and look at your cast-on row. All the loops should face the same direction—toward the center of the circle, not twisted around the cable. This is the most common mistake. If even one stitch is twisted, your first round will have a visible twist in it that you cannot fix without ripping back. Run your finger along the cable and check that the cast-on edge forms a smooth ring with no crossing over itself.
Place a stitch marker on the right needle tip to mark the beginning of your round. This marker will move with you as you knit and shows you where each round ends and the next one begins. Without it, you will lose track of where you are, especially in the first few rounds.
Join and knit the first round
Hold the needle so the left tip points to your left and the right tip points to your right, with the cable draped in front of you. The working yarn should be attached to the last stitch you cast on, which is on the right tip. Knit the first stitch from the left tip using the working yarn, pulling snug so the gap between the last cast-on stitch and the first knit stitch closes. You have now joined the round.
Continue knitting around the cable, moving stitches from the left tip to the right as you work. When you reach the stitch marker, you have completed one round. Slip the marker from the left tip to the right tip and keep going. The first round is often tight and awkward because the stitches are close together and the cable is in the way. This is normal. By round three or four, the rhythm becomes automatic.
If you notice a gap between your cast-on and your first round, you can tighten it by pulling the working yarn a little firmer on the first few stitches of the next round. Do not pull so hard that you distort the stitch, but a gentle extra tug helps close the join.
Manage the cable and avoid common tension problems
As you knit, the cable will bunch up in front of you. Push the stitches you have already knit down the cable toward the working stitches, keeping the active stitches on the needle tips. This prevents the cable from tangling and keeps your tension even. Some knitters find it helpful to rest the cable on their lap or a table to reduce hand strain.
The cable can create a tight spot in your fabric if you pull too hard on the working yarn. To avoid this, knit the first stitch of each round a little looser than the rest, and knit the last stitch of the previous round a little tighter. This evens out the tension across the join. If you see a visible ladder of loose stitches at the join, you are pulling too hard; ease up on the next round.
Some cables are stiff when new, especially metal ones. Warm water and a gentle stretch can soften them. If the cable is kinked, soak it in warm water for a few minutes and straighten it by hand. A kinked cable makes it hard to move stitches smoothly and slows you down.
Knit flat on circular needles when you need to
You can also use circular needles to knit flat pieces—back and forth in rows, just like with straight needles. This is useful when your stitch count is too high for your straight needles. Cast on as usual, but instead of joining, turn your work at the end of each row and knit back the other way. The cable straightforward sits in front of you while you work.
Knitting flat on a circular needle feels different because the needle tips are shorter than straight needles, and the cable can get in the way if you are not used to it. Some knitters find it awkward; others prefer it because the cable distributes the weight of the stitches more evenly. Try it both ways and see what feels natural to you.
Troubleshoot twisted stitches and dropped stitches
If you join and knit a few rounds only to notice a twist in your cast-on, you have to rip back to the cast-on row and rejoin. There is no way to fix it without unraveling. This is why checking for twists before you join is so important. Take the extra 30 seconds to lay the needle flat and verify that the cast-on edge forms a smooth ring.
Dropped stitches are easier to fix on circular needles than on straight needles because the cable holds the rest of your work stable. If you drop a stitch, use a crochet hook to pick it up, working from the dropped stitch up through the rows above it until the stitch is back on the needle. If the dropped stitch is more than a few rows down, you may need to rip back a few rounds to fix it cleanly.
Frequently Asked Questions
Do I have to knit in the round with circular needles?
No. You can knit flat (back and forth in rows) on circular needles just like you would on straight needles. Circular needles are useful for flat knitting when you have too many stitches for your straight needles to hold comfortably. straightforward cast on, turn at the end of each row, and knit back the other way.
What size circular needle should I buy for a beginner?
Start with a 16-inch needle in a medium size (US 6 to US 8) so you can practice with a small project like a hat. A 16-inch needle is easier to manage than longer ones because there is less cable to wrangle. Once you are comfortable with the motion, you can try longer needles for larger projects.
Why does my first round feel so tight and hard to knit?
The stitches are bunched close together on the needle tips, and the cable is stiff and in the way. This is normal and gets easier by round three or four. If it is very painful, you may be pulling the working yarn too tight; ease up and let the stitches relax on the needle.
Can I use the magic loop method instead of buying multiple circular needles?
Yes. The magic loop method uses one long circular needle (usually 40 inches or longer) to knit small circumferences like socks and hat brims. You fold the cable in half and work with half the stitches on each needle tip. It takes practice to learn, but it saves money if you knit many small projects. Start with a regular 16-inch needle before trying magic loop.
What happens if my stitches slip off the needle tips while I'm knitting?
This usually means your stitches are too loose or your needle tips are too small for your yarn weight. Check that your needle size matches your yarn (the yarn label will recommend a range). If the needle is correct, you may be knitting too loosely; tighten your tension slightly on the next round. You can also buy needle stoppers—small caps that fit over the needle tips to prevent stitches from sliding off.