Casting on and joining your first round
To knit in the round with circular needles, cast on the number of stitches your pattern calls for using one of your circular needle tips. Once all stitches are on the needle, slide them down the cable so they sit in the middle, then arrange them in a circle on your lap or work surface. Make sure the cast-on edge faces inward toward the center of the circle — this matters because if it twists around the cable, your finished fabric will have a permanent spiral.
Before you join, count your stitches to confirm you have the right number. Twisted stitches are the most common mistake at this stage, so take a moment to check that the bumpy side of your cast-on edge faces the inside of the circle. Once you are certain, use the working yarn attached to your ball to knit the first stitch of your cast-on row. This first stitch joins the circle and prevents a gap from forming at the seam.
After you knit that first stitch, keep working around the circle. You are now knitting in the round, and the stitches will gradually tighten as you complete the first few rows. The join will feel loose at first — this is normal and will even out as you work.
Key Takeaways
- Cast all stitches onto one needle tip, then slide them onto the cable and arrange them in a circle with the cast-on edge facing inward.
- Check that your stitches are not twisted around the cable before you join, because a twist will run through the entire finished piece.
- Knit the first stitch using your working yarn to join the circle, then continue knitting around without turning your work.
- Circular needles come in different lengths; use a length that fits your stitch count comfortably without bunching or stretching.
- You will knit every row when working in the round, so stockinette stitch appears as knit stitches only, with no purling needed.
Choosing the right needle length for your project
Circular needles come in lengths from 16 inches to 60 inches, and the length you choose affects how comfortable your work feels. The cable length should be slightly shorter than the circumference of your stitches when they are spread around the needle. If the cable is too long, your stitches will bunch and stretch; if it is too short, they will not fit and you will struggle to work them.
For a small project like a hat or the cuff of a sock, a 16-inch needle is standard. For a sweater body or a large blanket, you might use a 24-inch or 32-inch needle. Some knitters use the magic loop method with a very long needle (40 inches or longer) and fold the cable to work small circumferences, but this is an advanced technique and not necessary when you are starting out.
If you are unsure which length to buy, a 24-inch needle works for most projects. You can always use a longer needle than strictly necessary — the stitches will just sit more loosely on the cable — but a needle that is too short will make your work frustrating.
Managing tension and keeping stitches even
Tension often feels different when you switch from straight needles to circular needles because the weight of your work rests on the cable instead of in your hands. Your first few rounds may look uneven, especially at the join where you connected the circle. This is expected and will improve as you work more rows and the stitches settle.
To keep stitches even, maintain consistent pressure as you move from one needle tip to the other. Some knitters find it helpful to knit the first stitch of each round slightly tighter than the others to prevent a ladder effect — a visible line of loose stitches that can form at the transition between needle tips. You do not need to do this, but if you notice loose stitches forming at that spot, tightening the first stitch is a straightforward fix.
As you work, the cable will naturally warm up and become more flexible. This makes it easier to move stitches around and adjust your working position without strain. If the cable feels stiff or uncomfortable, you can briefly run it under warm water to soften it.
Understanding how stitch patterns change in the round
When you knit flat on straight needles, you alternate knit rows and purl rows to create stockinette stitch. In the round, you knit every row, and stockinette appears automatically. This means patterns written for flat knitting will look different when worked in the round, and you may need to adjust them.
If a pattern is written for flat knitting and you want to work it in the round, you will knit the right-side rows as written and purl the wrong-side rows as written. For patterns designed specifically for circular needles, the instructions assume you are knitting every round, so you follow them exactly as given.
Colorwork patterns, cables, and lace all work in the round, but you read the chart or instructions differently. Most patterns designed for the round show only the right side of the work, because you never turn your work to see the wrong side. If you are adapting a flat pattern, you will need to reverse every other row of the chart or instructions.
Fixing common mistakes at the join
The most visible problem at the join is a gap or ladder of loose stitches where the last stitch of the round meets the first stitch. This happens because the working yarn has to travel across the gap between needle tips. To prevent it, knit the first stitch of the round firmly, and on the next round, tighten the first stitch again by pulling the working yarn snug before you knit it.
If you notice a twisted stitch at the join after you have already worked several rows, you can fix it by carefully unraveling back to the join, straightening the stitch, and knitting forward again. If the twist is only one or two stitches in, this is worth doing. If it runs through many rows, it is usually faster to accept it and move forward.
Another common issue is stitches sliding off the needle tips during the join. To prevent this, make sure the stitches are seated firmly on the needle tips before you start knitting, and work the first few stitches slowly and deliberately. Once you have completed the first full round, the stitches will be find.
When to use circular needles versus double-pointed needles
Circular needles and double-pointed needles (DPNs) both work for knitting in the round, but they suit different situations. Circular needles are faster for large projects because you move all your stitches at once and do not have to transfer them between multiple needles. They are also less likely to drop stitches because the cable holds them securely.
Double-pointed needles are better for very small circumferences — like the top of a hat or the leg of a sock — where circular needles become too long to work comfortably. Some knitters prefer the feel of DPNs because they use shorter needles and have more control. Others find them fiddly and prefer circular needles for everything.
You do not have to choose one or the other. Many knitters use circular needles for the body of a project and switch to DPNs or the magic loop method when the circumference becomes too small. As you gain experience, you will develop a preference based on what feels natural in your hands.
Frequently Asked Questions
What happens if I twist my stitches when I join the circle?
A twisted join creates a permanent spiral in your finished fabric that runs through every row. If you notice the twist before you have worked more than a few rows, unravel back to the join, straighten the stitches, and knit forward again. If you do not notice until later, you can either accept the spiral as part of your piece or unravel the entire project and start over.
Can I use circular needles for flat knitting?
Yes. You can knit flat on circular needles by working back and forth the same way you would on straight needles — knit one row, turn, purl one row, turn, and repeat. This is useful if you prefer the feel of circular needles or if you want to switch between flat and in-the-round sections in the same project.
Why do my stitches look loose at the join?
Loose stitches at the join happen because the working yarn has to travel across the gap between the needle tips. Knit the first stitch of each round firmly, pulling the working yarn snug before you insert the needle. After a few rounds, the tension will even out and the join will look neat.
Do I need a different size needle for circular needles than for straight needles?
No. The needle size is the same — a US size 6 circular needle is the same thickness as a US size 6 straight needle. The only difference is the shape and the cable length. Choose your needle size based on your yarn and pattern, not on whether the needles are circular or straight.
What is the magic loop method?
The magic loop method uses one very long circular needle (40 inches or longer) to work small circumferences by folding the cable into a loop. You work a small section of stitches, then slide them down the cable and work the next section. It takes practice to learn, but it eliminates the need to buy many different needle lengths.