The 1 season down quilt comes with a 6" X 12" stuff sack, it fits it pretty good and can be made smaller. I actually use a larger dry bag style sack, a 10 liter OR dry sack. It is larger than the Golite stuff sack, but by burping air out, I can make it tiny or leave larger to fill pack space.
The factory stuff sack, and storage bag from golite are good quality, and sized right. I once had a Western Mountaineering bag that had a stuff sack the size of a cantaloupe, but it would not be good for the bag, plus it took all morning to stuff it, so I did not use the factory stuff sack.
Anyway at 6" X 12", the Golite is not packed all that tight, so you could make it smaller if needed.