Stunted growth in ball pythons?

Does anyone else think he seems small or is he actually a good/correct size? I guess I’m just used to seeing larger males of my friends, mine are all still sub adults or juveniles, except this guy so going on his past I’m just not sure if he’s maxed out or the 14 years in a 10 gallon held him back. And if at 14 he could continue to grow now that he’s been upgraded.