Just tried it on, and am happy to report it is not too big. Nope. No sir-ee. Not at all. Not too big.
But it also doesn't fit. Because, you see, it's just a bit TOO SMALL. And the reason for that is although I took great care to measure me, measure the sweater, test the gauge and all those other good things, I knit it to fit the size I was at when I began, I have since gotten a bit bigger. Not a lot bigger, mind you, but apparently just enough to make this lovely sweater fit a little more snug than it ought to. So the sweater fits, but it only fits me in the past and since I haven't figured out how to bend time, I'm stuck in the now with a sweater that fits me in the past. And until I can either figure out how to get the sweater to me in the past, or I somehow figure out how to lose the weight I've gained (and let's face it, even though it's a small amount of weight it's not going to go away on it's own and at this stage of the game it might be easier to invent time-travel) I may never get to wear this sweater. And I really don't think I can bear to unknit this yarn once again.
But at least the problem is new. At least I corrected the whole "knit a sweater that's too big thing". That's some kind of improvement, right?
PS> I feel the need to point out the weight gain is not due to overindulgence (though I've been known to do that too ....) but to a very effective anti-thyroid medicine.)