Thanks for the reply Mark. My main point was that although I have heard and seen an egg bound female Ball Python, it is a pretty rare event from all of the people I talked to. I don't really think that size is that big of an issue. I have a small female that is in her POS right now, and I palpated 6 eggs in her. Those eggs are smaller than normal eggs. Therefore, I believe that a MATURE small female can lay without problems, and just typically has smaller eggs.
What was the average weight of the eggs that your female just laid. I would guess that they are in the 60 gram range, if my theory is correct.
EDIT: I just saw the eggs in the scale pic, and my theory was pretty close I guess. The egsgs average 62.5 grams each.