A yarnover (yo) increases by one stitch, and is often used to increase in lace knitting patterns. As the yarn over makes a small hole, it is also used for making buttonholes. This tutorial shows how to knit a simple buttonhole using yarnover (yo). The size of the finished buttonhole will depend on the needles and yarn used.
How to work a yarnover
This yarnover is used after working a knit stitch, and before working another knit stitch.
STEP 1 – Knit to the position of the yarnover.
STEP 2 – Bring the yarn forward between the tips of the needles. (In the example, I have knitted 8 stitches before the yarnover, and the 8 knitted stitches are on the right hand needle.)
STEP 3 – Take the yarn backwards over the right hand needle.
STEP 4 – After pulling the yarn you will have another “stitch” on the right needle. (In this example, there are now 9 stitches on the right hand needle.)
STEP 5 – Insert the tip of the right hand needle into the next two stitches on the left hand needle from front to back (to knit two stitches together).
STEP 6 – Wrap the yarn around the right hand needle to knit two together.
STEP 7 - Pull the new loop on the right-hand needle through the two stitches on the left-hand needle. Slip the two stitches off the left-hand needle to finish the knit two together (k2tog).
STEP 8 – Knit the remaining stitches on the needle. On the next row, knit or purl as usual, treating the yarn over as a regular stitch. (In the example I am using garter stitch (knit every row), and you can see the small hole that has been created where the yarnover was worked).