When Jem and Scout initially meet Charles Baker "Dill" Harris in chapter 1, Jem mentions that Dill is "right puny" for his age. Dill is a short child, and Scout even says that she towers over him despite the fact that he is older.
After Dill impresses the children by elaborating on the film Dracula, Scout mentions that he has "snow-white hair" that resembles "duckfluff" on the top of his head. Dill Harris also has a cowlick sticking up in the center of his forehead that he continually grabs.
The reader is also told that Dill has fascinating blue eyes that lighten and darken. Scout also describes Dill's apparel by mentioning that he wore blue linen shorts, which buttoned into his shirt. Dill's laugh is depicted as as sudden and happy.
Later on in the story, Dill Harris is referred to as a "pocket Merlin" for his tiny body and extraordinary talents. Dill is a fascinating, humorous character throughout the novel, who becomes close friends with the Finch children and participates in numerous adventures with Jem and Scout.