Central Double Decrease (CDD or S2KP)

A central double decrease works three stitches together resulting in one stitch that lies vertical with no lean. This stitch is often used at the base of v-neck openings. A central double decrease is also found in many beautiful lace patterns.

While there are several variations of this stitch, I have provided a video that demonstrates the option with the smoothest result.

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  1. rebecca current
    Posted September 16, 2011 at 11:53 pm | Permalink

    You are my knitting guru! And I was wondering how do you do this purlwise? My pattern calls for it, and I am stuck! Help!!

    Thank you,


  2. Posted September 17, 2011 at 12:28 pm | Permalink

    Hold on to your hat! It is is bit trickier on the purl side.
    1. Slip one stitch as if to knit, slip the next stitch as if to knit.
    2. Return these slipped stitches to the LH needle keeping them twisted.
    3.. Insert the RH needle through the back loop of the 2nd stitch and then the 1st stitch and then slip them together to the LH needle. (I know, it sounds crazy!)
    4. Purl the next stitch on the LH needle.
    5. Pass the 2 slipped stitches over the purl stitch and off the RH needle

  3. rebecca current
    Posted September 17, 2011 at 11:23 pm | Permalink

    Thank you so much! It was crazy, but it worked! 🙂

  4. Bonnie
    Posted January 29, 2012 at 5:24 pm | Permalink

    I am trying to figure out this for a hat I am making. In step number 3, are the stitches actually supposed to be slipped to the RH needle instead of the LH one? It seems like you have already just slipped them onto the LH needle. To me it seems like they would be going back onto the RH needle. Then you purl the next stitch and then slip the passed stitches over the stitch you just purled, making 1 stitch. I haven’t done this decrease on the purl-side yet so I’m completely new at trying to figure it out.


  5. Posted January 29, 2012 at 7:54 pm | Permalink

    To make a central double decrease on the purl side, slip 2 stitches as if to p2tog through the back loop. Purl 1 and then pass the 2 slipped stitches together over the purl stitch. Hope this helps!

One Trackback

  • By Kaika – Part 4 on April 24, 2015 at 3:12 pm

    […] the 3-stitch Japanese bobble also eliminates the pass over step, but it uses the very precise Central Double Decrease to reduce the stitch count at the conclusion of the bobble.  I love this dainty bobble which […]

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