* Average height: Greg isn't particularly tall or short, just average for his age.
* Slightly overweight: Greg isn't obese, but he's definitely on the heavier side. He often mentions his weight and struggles with it.
* Unremarkable appearance: Greg doesn't have any stand-out features. He has brown hair and brown eyes, and he's described as "ordinary" and "forgettable."
* Often wears a t-shirt and jeans: Greg's clothing choices are typical for a middle school boy, and he rarely ventures outside of his comfort zone.
* He doesn't take care of his appearance much: He's not particularly stylish or concerned with hygiene, often appearing messy and unkempt.
Essentially, Greg's physical appearance is intended to be relatable and normal, reflecting the average middle school experience. The focus of the books is on his personality and experiences, rather than his physical appearance.