Formal:
* Menina pequena: This is the most literal translation, meaning "small girl".
* Menina miúda: Similar to "menina pequena", but with a slightly more informal tone.
* Criatura: This word can be used for a child, but it has a more formal and respectful connotation.
Informal:
* Menininha: This is a more affectionate and endearing term for a little girl.
* Pequena: This is a shortened form of "menina pequena" and is commonly used in informal contexts.
* Pequenina: This is another diminutive form of "pequena" and can be used to emphasize the child's smallness.
Note: You can also use the terms "filhinha" (little daughter) or "netinha" (little granddaughter) depending on the specific relationship.
Ultimately, the best way to say "little girl" in Portuguese depends on the specific situation and your relationship with the person you are talking to.