I agree 100% with ArtLady. If the extra width really bothers you, it's not hard to take in the sides a bit just as you would a woven top. Here's a terrific tutorial which I used to save a sweater that was knit gauge but looked to big.
(Hmmm. Why can't I cut-and-paste here? Okay, I'll retype the URL.)
A sewing machine is recommended but it you don't have one you can do the sewing by hand.