Thre may be a slight size difference between morph/normal but its doubtful. There IS usually a noticable size difference between males and females. As for certain localities. The desert morph may be a bit smaller but until someone posts a pic and weight of one that is 10 years old we may never know. The sahara region balls are definately larger by quite a lot but its believed this is because of the available diet & difference in climate/seasons. Not genetics. But who knows unless some scientist does genetic testing on them.

BPs fall into the catagory of having an indiscriminate growth factor. Like crocs & many other reptiles do. This means there is no way to say just how big any one BP can or will get. They continue to grow at some rate for their entire lives.

A Retic measuring 48 feet 8 inches long and weighing 983 pounds was discoverd in the village of Curugsewu in Indonesia. No one ever thought they could get that big. I bet that snake is quite old too.

Their growth will slow down & be almost un-noticable after they hit a certain size, but they are still growing. My 7 year old has still not hit 3000 grams. She is still growing. Even her head is a little bigger than it was a year ago. Her growth spurts start & stop depending on her feeding habits. Which are very scattered.

Generally you wont have a BP get any bigger than 2500 grams but 3000+ is very possible as the years go by.