You can see that I can get four along the width, and probably 8-9 along the length here. I got to 50 since we were using smaller dough balls for the market before. There doesn't need to be a bunch of room between the bags as long as you take the dough balls out of the fridge and use them fairly quickly... once they sit at room temp for awhile (1 hr?), they start expanding and it becomes slightly more problematic for the balls to be sticking... still workable, but just more problematic.
Straight from the fridge for a few minutes, the dough balls should pop right out into your flour bowl, and be fairly easy to work with.