On subsequent rows, the yarn-over will be knitted, making a new stitch.

Instead, a yarn-over is done adjacent to the slipped stitch, and the two are knit together on the following row.

Yarn-over and out.

This disadvantage of this method is that a small hole (eyelet) is produced at the yarn-over.

The term "yarn-over" refers only to the act of wrapping the yarn around the needle, and not to the working of the next existing stitch.

The yarn-over may also be dropped on the next row, producing a longer stretch of yarn between the stitches of the previous row.

Yarn-over increase or "eyelet increase" - The simplest increase is to do a yarn-over between two existing stitches.

Raised Increase - Lift the strand connecting two knitted stitches in the row below onto the left needle (effectively producing a yarn-over) and knit it, either normally or twisted.

Alternatively, the yarn can be "tucked", i.e., made into a yarn-over that is knitted together with the slipped stitch on the next row; like the simpler wyib, this is invisible.

Yarn-overs are often used to increase the number of stitches, since knitting a yarn-over creates a new stitch where none existed previously, but does not use up a stitch on the needle.

There are several types of yarn-over, depending on how many times the yarn is wrapped around the knitting needle and on the direction (chirality) with which the yarn is wrapped.

Conversely, the effect of a yarn-over can be obtained by picking up the yarn between stitches of the previous row; the difference is that the yarn then is shorter, and the flanking stitches of the previous row may be overly drawn together.