The selvage of a knitted fabric consists of the stitch(es) that end each row ("course") of knitting. Also called selvedge, the term derives from "self-edge". The selvage may be considered finished; it may also be used in seaming garments, or finished and reinforced using crochet or other techniques. There are many methods for producing selvages.
References
Selvage (knitting) Wikipedia(Text) CC BY-SA