While not a quilt, it took about as long as a big quilt!
I worked on this off and on for about three years. At one point I had an "accident" and about 50 stitches fell off the needles.
At first I cried, then I stubbornly sat and put them back onto the needles and make sure the lace pattern was intact; I'd worked too hard on it at that point to just give up on it!
The tablecloth measures approximately 5 feet across.