With 8 strands of yarn held together and 20.00 mm needles, I was able to make a blanket for Pusheen:
With only 30 stitches, this was a very quick knit. You can see that at almost 1" per stich, it is quite large:
Eek! Sorry for the blurry photos (for some reason, they turned out really small, and I had to enlarge them).