My circular sweater was 30 inches in diameter when I noticed how absolutely pathetic my 10th row was in comparison to the rest of the piece. With regrets, I ripped the whole thing out, back to the 10th row. It was all so nice, except for that one row. I have a huge pile of medium fawn alpaca blend yarn resting on the bed now and a very small, but much better looking, circular piece of crochet work there next to the yarn pile.
In a couple of days, it will return to its former 30 inches in diameter glory, provided I don't mess up another row.