What evidence is there that shows us that holden probably doesnt look as old as he says he looks?

In J.D. Salinger's "The Catcher in the Rye," Holden Caulfield frequently mentions that he is sixteen years old but often reflects on how he feels younger and is perceived as such by others. For instance, he describes instances where adults mistake him for a younger boy, indicating that his outward appearance does not match his self-perception as a mature individual. Additionally, his behavior and attitudes, which often reflect adolescent confusion and immaturity, further suggest that he does not carry the weight of adulthood he claims to have. These elements together imply that Holden likely doesn't look as old as he asserts.