Why does buster browns dogs collar say 5?

Buster Brown's dog, Tige, wears a collar that says "5" as a playful reference to the fact that the character Buster Brown is often depicted as a young boy, typically around five years old. The collar symbolizes childhood innocence and the bond between Buster and Tige. This detail is part of the branding that made Buster Brown a recognizable figure in American culture.