How to Decrease a Stitch in Knitting

Use for Shaping and Lace

Decrease a Stitch was Revised by Janice Jones on 6-29-2021

To decrease a stitch simply means  "subtracting" the stitch (or a few of them) from the number of stitches in the row for shaping and design.

Different techniques of decreasing allow you either to make decreases  hardly visible or, on the contrary, make them clearly visible in the knitted fabrics. This way they will create additional decorative effect to your design.

When used in shaping such as when making an armhole for a sweater, it is important that the decreases slant in the way you want them to.  For this reason, we will call them left-slanting or right-slanting decreases and they are normally made on both sides of a row.  For this reason, they should mirror each other, which means that they must slant in opposite directions, be the same size, and should be in the same position in relation to each other.  In other words, you want the decreases to match.

Decreases are also used when creating lace and I will touch on this later in the article.

Slipping a Stitch

Many of the techniques on this page require you to slip a stitch.  Slipping a stitch is simply passing a stitch from the left needle to the right needle without knitting or purling it.

To slip a stitch knitwise, insert the right needle into the next stitch to be knitted but do not knit. Pull the stitch off of the left needle and place it on the right needle.  The unworked stitch is now on the right needle.

To slip a stitch purlwise, insert the right needle into the next stitch to be purled, but do not work it.  Pull the stitch off the left needle and place it on the right needle.  The unworked stitch is now on the right needle.

Decrease a Stitch: Index

There are dozens of ways to make increases which designers use for the decorative purposes.  In this tutorial I will be discussing these different methods:

Right-Leaning Decreases

Left-Leaning Decreases

Double Decreases

Ways to Improve Your Decreases

Decrease a Stitch:  Right-Slanting

Method One:   K2tog and P2tog

You can make  decreasing  either in the knit row ( K2tog =  knit  2 stitches together)  or in the purl row (p2tog = purl  2 stitches together ). 

  • (k2tog) produces a right hand slant on the knit side of the fabric. (p2tog) makes a left slanting slope on the purl side.

  • To knit two stitches together in the knit row, insert your right needle tip thought two stitches at once on the left-hand needle, then knit  them as if they are a single stitch.

  • To knit two stitches together in the purl  row, insert the tip of your right-hand needle thought two stitches at once, then purl  them as if they are a single stitch.

I would like to remind you , that all knitting stitches and technique are EXACTLY the same for both CONTINENTAL and English style of knitting.

K2tog

P2tog

Method 2: KSP (Knit, Slip, Pass)

KSP stands for Knit, slip, pass and it is another form of a right-slanted decrease. 

To make the KSP:

  1. Knit one stitch and return it to the left needle
  2. Pass the stitch to the left of the one you just knitted over the knit stitch
  3. Return the stitch to the right needle

Decrease a Stitch:  Left-slanting

Method 1: SSK (Slip, slip, knit)

When shaping a garment, you will need a left-slanting decrease to mirror the right-slanting decrease.  The SSK works well with the K2tog.

It can be done either in the knit row: ssk= slip, slip, knit 2 stitches together.  Decreasing a stitch in the purl row has abbreviation ssp= slip, slip, purl 2 together.

SSK will produce left-slanting decrease in the knit row. SSP will look as a right-slanting decrease in the purl row.

To Make a SSK:

  1. Slip two stitches from the left-hand needle onto the right-hand needle, one at a time.
  2. Insert the left needle into the front of the two slipped stitches and knit them together.

TIP:  The SSK decrease is not as easy to make as the K2tog and therefore, these decreases often show up as larger stitches on the fabric.  Use your needle tips to work the decrease and try to manipulate as little as possible otherwise they become stretched and look larger.

SSK

SSP

Method 2:  SKP (Slip, Knit, Pass)

For this method, you will do the following:

  1. Slip the next stitch to be knitted and place on the right needle.
  2. Knit the next stitch.
  3. Pass the slipped stitch over the knit stitch and off the needle.
  4. You have just decreased one stitch.

This is a more common decrease in British or Japanese publications, but not as common in the U.S.

Decrease a Stitch: Double Decreases

Double decreases are often used when you are knitting lace.  You could do a K3tog (knit 3 together) but you won't see this method used very frequently.  There are two commonly made double decreases:

  • S2K1P (Slip 2, Knit 1, Pass)
  • S1K2P (Slip 1, Knit 2, Pass)

S2K1P:  Slip 2, Knit 1, Pass

This type of decrease is used for making lace, but it is also used when you might be making a V-neck sweater or vest.  It is the type of decrease that is created in the center of a ribbed band and creates the V for the V-neck sweater.

To Make the S2K1P:

  1. Slip two stitches together from the left-hand needle to the right-hand needle
  2. Knit the next stitch on the left needle
  3. Pass the two stitches that you slipped over the knit stitch and off the needle.

You can see that the center stitch is on the top.

S1K2P:  Slip 1, K2, Pass

The difference between the S1K2P is where the center stitch appears.  In the S1K2P, the center stitch is on the bottom.

To make the S1K2P:

  1. Slip one stitch knitwise
  2. Knit the next two stitches together
  3. Pass the slipped stitch over the stitches that you knit together.

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