The concept of clothing being exclusively for boys or girls is influenced by cultural norms and societal expectations, which can vary greatly across different regions and time periods. However, I can provide you with a list of clothing items that have traditionally been associated with boys or are more commonly worn by boys in many cultures. Please note that these associations may not be universally applicable or rigidly defined:

1. Trousers or pants: Historically, pants have been considered a male garment in many societies.
2. Shorts: While shorts can be worn by individuals of any gender, they are often associated with boys, especially in casual or sporty settings.
3. Suits: Formal suits, such as tuxedos or tailored suits, are commonly worn by boys for special occasions like weddings or formal events.