Here are some examples:
* In the comics, Supergirl's height has fluctuated over the years. She's often depicted as being slightly shorter than Superman, who is usually around 6'4".
* In the TV show "Supergirl", Melissa Benoist, who plays Supergirl, is 5'5". However, the character's height isn't explicitly stated in the show.
* In the "Superman/Batman: Public Enemies" animated movie, Supergirl is depicted as being shorter than Superman, but taller than Lois Lane.
Ultimately, the height of Supergirl is up to the individual artist or writer.