Julie that is looking fantastic. I'm always amazed at how much better the effect is once eveything is sewn. :-D
Daisey I'm sooo pleased you managed to rescue your fabric! To add to what Gai said, each strip set yields around 18 - 19 hexagons and they finish (if you cut the 3 3/4" standard as stated in the book) at around 6" across (though they're not square)
As this is a 12" repeat, one set of repeats gives 3 sets, ie 57 hex blocks. This would take 2 yards of fabric. If you cut double repeats, you'd get 6 strip sets yielding 114 hex blocks and it would take 4 yards. I would do the latter, then with borders, build it out to queen size. When you cut double repeats though, you're likely to get duplicate hexagon blocks so you might have to play around with the orientation as described on p 29 (of this first book) :-D