There is not much growth in his childhood days. However, during "Big Bang Theory," the adult Sheldon grows to be more caring when he marries his wife, an award winning neurologist.

Sheldon is about 4 feet 5 inches tall (in seasons 1-2). He has slick dark brown hair, parted to the left. Sheldon has blue eyes. When out in public, he wears a collared shirt with a checkered pattern, along with long pants either khaki or blue. For footwear, Sheldon only wears brown Sperry penny loafers, as stated in season 2. 

For accessories, Sheldon usually wears a bowtie to appear more mature and be taken seriously like an adult. However, he later grew out of it.

Despite his intellect, Sheldon's hobbies are no different from other kids. Sheldon loves comic books, and wears superhero themed shirts. He continues to do this even as an adult. Another hobby was playing with his train set, which he loved from the very start. He plays Dungeons and Dragons with his high school friend Tam and his neighbor Billy Sparks.