Alright, this is getting a little confusing now. Somebody here posted a picture of a box that once had 20 pieces of gum inside (Alan Ameche). Now I found this Jim Brown box online:
This is a 40 pack box. So we now know that there were at least two different sizes. This got me thinking about one thing: if you wanted to get your hands on one of the stars, such as Jim Brown or John Unitas, then maybe you had to purchase the 40 pack box. In other words, to get the stars, you had to spend more money. Only the less popular players were found on the 20 pack boxes - what do you guys think? I just came across another 20 pack box now with Chuck Conerly on it and this further supports my above argument. Here it is below: