Bella is described in the novels as being very pale with brown hair, chocolate brown eyes, and a heart-shaped face. Beyond this, a detailed description of her appearance is never given in the series. Stephenie Meyer explains that she "left out a detailed description of Bella in the book so that the reader could more easily step into her shoes." While Meyer stresses that "Bella's looks are open to interpretation", she does supply her own personal interpretation on her website, describing Bella as:
"very fair-skinned, with long, straight, dark brown hair and chocolate brown eyes. Her face is heart-shaped—a wide forehead with a widow's peak, large, wide-spaced eyes, prominent cheekbones, and then a thin nose and a narrow jaw with a pointed chin. Her lips are a little out of proportion, a bit too full for her jaw line. Her eyebrows are darker than her hair and more straight than they are arched. She's five foot four inches tall, slender but not at all muscular, and weighs about 115 pounds. She has stubby fingernails because she has a nervous habit of biting them."