You can go way up on the needle size and do less sts or pattern repeats and you should be okay. It helps if you tell us which pattern it is though, then we can see how much the original is supposed to take. But you ought to have enough at 1000 yards.
Okay, you'll probably have to use less stitches. Figure out how many inches the CO would be in the pattern gauge, then multiply the inches times your gauge. You'll have to adjust that number a little so you get the right multiple for the lace pattern. I see there's a couple different sizes, so you might want to make the smaller one. You'll probably have enough yarn for 2 shawls.
would I have to use less stitches for the 1000 yards?? Would like the medium size and I think that the thicker wool would yield a slightly larger shawl which is fine for me (medium as 24 inches is too short - so I thought the yarn and medium pattern would create something larger than medium but smaller than large)
Well sure, you could use the sts for the medium pattern, and larger needles. Because of the lace pattern, you wouldn't want to use the size 4 needles, but at least 7s and maybe even 8 or 9s, or the pattern isn't going to open up too much.
That would be great. I'll probably use 8s because I tend to knit a little loose. Just wanted to be sure that the 1000 yds would be enough. The yarn that I have in mind is so pretty and would work well with this pattern