Casting - binding off

When you want to finish your piece you will have to use the cast or bind off stitch. This stitch is used at various levels while knitting - such as shaping of the armhole, horizontal buttonhole, button hole and while shaping a neckline.There are several methos, this is the the basic method that is mostly followed by knitters.it is to be noted that when you are casting or binding off , please use one size larger needles so that the casting/binding off stitches are not too tight as it can create an edge that will be shorter than the width of the fabric

Source: The Knitter’s Handbook - Hamlyn