MPAA: PG (Parental Guidance Suggested) for some mild language and thematic elements.
British Board of Film Classification (BBFC): PG (Parental Guidance Suggested)
Other ratings:
* Germany: 12
* Australia: PG
* New Zealand: PG
* Canada: PG
The PG rating is generally given to films that may contain some material parents might find unsuitable for young children. In the case of "Big," the rating likely reflects the themes of growing up too fast, the occasional use of mild language, and some scenes that could be considered slightly suggestive.