Using the Kitchener stitch to join two pieces of knitting is also called grafting. The Kitchener stitch, when done properly, looks just like another row of knitting and creates a smooth and seamless join. It's an ideal way to close a toe because any additional bulk across the top of the toe would be irritating inside shoes.
The Kitchener stitch has a bad reputation. It's not difficult, but it does require a little practice. I've included several links to instructions for Kitchener stitching below. You can find more resources by doing a Google search on "kitchener stitch".
http://www.socknitters.com/lessons/lessons.html
http://www.queenkahuna-creations.com/kitchenerstitch_socktoes.pdf
http://www.royea.net/sockdemo6.html
Here's what my sock looked like after I finished grafting the toe. I used red yarn so that you could see the stitches better in the photos.
Here's a closer shot of my Kitchener stitching.
Finally, weave in any loose ends. Congratulations, your Basic Ribbed Sock is done!
Now cast on for its mate before SSS sets in!
