Does the Mont Bell Alpine Light Down Jacket Women's fold into a pocket or small sack? Or is it more bulky than others?

It's not bulky at all, and comes with it's own little stuff sack, about 8" long and 4" inches around. This jacket is the best compromise between Montbell's ultra light inner parka (which I ordered, and was just too thin), and something much bulkier like the Marmot down jacket I also own. I had previously tried a couple of Patagonia's down jackets, but didn't think they were as warm for being heavier as far as weight. I bought this specifically for backpacking, and to wear under a waterproof shell in cold weather. So far, it's been very versatile, and keeps me warm by itself in temps in the low 20's. It doesn't run as small as I expected (according to the sizing). I usually wear a medium and bought a large. It's a tad roomy, but I don't mind, as there's room to layer, and I'm not swimming in it.