This tutorial explains how to work a sl1-k1-psso (or skp) decrease. This method decreases one stitch, and it is a left leaning decrease. Let’s see how it works.
Looking for a sl1-k2tog-psso double decrease? You can find our sl1-k2tog-psso tutorial here.
If you’re looking for the central double decrease, sl2-k1-p2sso, you can find our sl2-k1-p2sso tutorial here.
This tutorial includes:
- What IS a sl1-k1-psso decrease anyways?
- sl1-k1-psso video
- How to work a sl1-k2tog-psso
- What does this decrease look like in a decrease line?
- More decreases
What IS a sl1-k1-psso decrease anyways?

A sl1-k1-psso is a single, left leaning, decrease – this means you are decreasing 1 stitch. It is an alternative to the ssk (slip, slip, knit 2 stitches together through the back loop) stitch (you can find our ssk tutorial here). In the swatch above, at the centreline, I’ve worked a k2tog, then 1 knit stitch, then a sl1-k1-psso.
sl1-k1-psso video
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How to work a sl1-k2tog-psso
- Slip 1 stitch from the left needle to the right needle knitwise.
- Knit one stitch. You’ll now have the slipped stitch and the knit stitch on your right needle.
- Insert the left needle through the front of the second stitch on the right needle and lift it over the first stitch on the right needle and off.




What does this decrease look like in a decrease line?
As the decreases start to stack up, you can see how the decrease line looks.

More decreases
There are MANY methods for decreasing stitches in knitting. You can find all of our decrease posts here and our post on decrease lines is coming soon!
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