Here’s Everything You Need to Know About Circular Knitting Needles

Circular Knitting Needles

The circular knitting needle may seem like a specialty tool, but it could actually be the most useful needle in your knitting bag.

Sure, circular needles — two tapered needles connected by a flexible cord — are great for larger projects and knitting seamlessly in the round. But they’re so much more than that — you can use them instead of straight needles in any project, and you can also use them instead of double-point needles with the help of magic loop.

Before you go trading in all your needles for circulars, it’s important to understand cord lengths. The needle tips themselves follow the same rules as straight needles, but circulars come in a variety of cord lengths, too.

So, say a pattern calls for size 7 16″ needles: That first number refers to the needle size (aka the size of the needle head), and the second one is the length of the needles from tip to tip.

Most patterns will tell you which cord length you need for your project, but if your’e going rogue, here’s our handy guide to cord lengths.

The Key to Cord Lengths

three circular knitting needles

9″

Good for: really, really narrow projects, like baby hats, and sleeves

This the shortest length you’ll find — anything with a smaller circumference will need to be worked on double-points, because it just isn’t possible for the needles on a shorter cord to even come together to work stitches.

16″

Good for: small projects, knitting in the round

These needles are perfect when the project is just a bit too large to fit on double-pointed needles, including hats (for grown-ups and for kids), baby-sized sweaters and booties, and collars and sleeves on the sweaters you knit for grown-ups. Hat patterns will often ask you to use a 16″ circular needle to work the brim, and then switch you over to double-pointed needles as the hat gets smaller at the crown.

24″

Good for: most projects, especially sweaters

29″

Good for: medium-sized projects knitted flat or in the round

The 29″ needle can be used for things like baby blankets or cardigans that are large but not as big (or heavy) as a shawl or adult-sized blanket.

If you’re knitting a sweater in the round, this is a solid choice for working the body.

36″

Good for: heavy or large projects that will be knitted flat; small circumference projects knit with magic loop

Knitting something heavy like a shawl on straight needles can be a pain in the wrist — literally! That’s when you break out the 36″ circular needles. They put all the weight of the project onto the cord, allowing you to speed along as you knit, while the rest of the knitting is on your lap or on the table. Straight needles also have a limited amount of space on them, so casting on 340 stitches is probably impossible. Again, not so for 36″ circular knitting needles.

This is also a great length if you want to try knitting a sleeve with the magic loop method instead of DPNs.

40″ and Up

Good for: knitting socks and sleeves two at a time, bed-size blankets

Circular needles also come in lengths of 40″ and 47″, and even go longer than that.

Discussion
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14 Responses to “Here’s Everything You Need to Know About Circular Knitting Needles”
  1. Dianne
    Dianne

    Socks are knit very easily on 9” circular needles, only using dpn for the toe. It’s been a game changer for me!

    Reply
  2. Eldora Upton
    Eldora Upton

    I love to crochet, but now that we have an Online Shopping Mall I don’t have much time for myself. I like to knit too, but crocheting is my favorite.

    Reply
  3. Anna
    Anna

    I knit a lot of socks and use the smallest size I can, but have to revert to 4 needles for toes casting off. Not used magic loop before.

    Reply
  4. Janise Fournier
    Janise Fournier

    Is it a good idea to store circular needles wound up? I have made a container whereby they are all ‘flat’. They are very annoying when they want to curl while one is knitting. I then have to swirl them in hot water to straighten them; doesn’t happen with a suitable container.

    Reply
    • Susan K Miner
      Susan K Miner

      So what is a suitable container for circular needles? I use them almost exclusively anymore.

      Reply
    • Donna Vassar
      Donna Vassar

      No longer have any straight needles (except a couple pairs small double point for specific small projects),

      Reply
      • Pamela McCamant
        Pamela McCamant

        I use two 16” when I’m decreasing for a crown on a hat rather than double points.
        I have trouble with losing needles or worse stitches sliding off.
        I also use my 9” to hold stitches when making cables.

        You forgot about 12” circulars.

        Reply
        • Elizabeth Bell
          Elizabeth Bell

          What a good idea. I can never use double pointed needles when finishing the crown of a hat as I keep dropping stitches.

          Reply