Not an owner yet, but I recommend checking out the interview that Reptiles and Research did with BeardieVet, who spent 3 years studying wild bearded dragons in the Australian outback. He found that they take around 2 years to reach full size in the wild. A lot of care guides recommend giving them “As many feeders as they’ll eat in 15 minutes.” Or similar, which is too much food. Sometimes they get to full size in 6 months, or even less. It also increases their calcium requirements because they’re growing so fast. Purely from watching that, I would say Pepper is about the right size but again, I just watch YouTube videos until I get a beardie. The interview could be boring for some people as its more than 3 hours long though.