Occasionally when you're knitting you'll run into a situation where you have to graft two ends of, say, a cabled or ribbed band together to make a loop.
Unfortunately most of the tutorials on the web only discuss the situation where you're grafting stockinette to stockinette, so if you have to graft two ribbed edges together and you need the ridges to match up you may be in a bit of a fix.
Fortunately, making the leap from grafting stockinette to grafting ribs isn't that difficult. (The hard part is wrapping your head around kitchener stitch at all.) ( Here's how to do it. )
( The quick reference version. )