I don't have a pic, but my largest one was about 5 heads/mouths and was in a "D" shape. It is now a perfect circle. The smaller one is starting to grow into a circle as well.
If you mean ball up as in grow into a ball, sort of. It is more like I guess a Dome right now. The bottom is flat and it is shped like a dome would be. But it just keeps growing out and getting a little taller as it does. If it helps the larger colony was about 2"s when first bought, now it is 5"s