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.

6 thoughts on “Central Double Decrease (CDD or S2KP)

  1. Pingback: Kaika – Part 4
  2. 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!

  3. Hello,
    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.


  4. 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

  5. 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,


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