Your choice of crochet edge can make or break your design. Leaving an edge unfinished is not the end of the world, but if you really want your project to soar, choosing an appropriate finishing stitch can really take it over the edge! - Crafting In Line
This is a really nifty little pattern for making a neat bobble-shell edging. I created it to finish off the top and bottom edges of my crochet Wrist Warmers, but it could be used along any edge that needs a.
This pattern uses just one crochet stitch - Treble Crochet (this is called a Double Crochet in the US). It's an incredibly simple but very effective mixed stripe using two rows of crochet for each colour. The simplicity of it.
How To: Crochet The Double Crochet V Stitch - Easy Tutorial