Just like the garter stitch, stockinette stitch is one of the most basic and also one of the most used stitch patterns available. Because this pattern tends to curl when not knitted with a border, it is perfect for socks, sleeves, and hats. But if you want to flatten out the curl of the stockinette stitch, you can block it.
Blocking is a technique used in knitting where you can flatten or shape your project by wetting it, pinning it down, then leaving it to dry. I prefer to pin it then use the steam function on my iron. I find this technique is fast and mess-free.
Any number of stitches will suffice.
Knitting Flat or Back and Forth
Row 1: knit.
Row 2: purl.
Knitting In The Round
Knit all rounds.