Do some girls grow after 16?

Yes: The potential for continued linear growth is determined by an interplay of the hormones of puberty and the growth centers of the long bones.As long as the growth centers remain open, growth is possible. However, the initiation of menses provides a well defined marker in girls, and most can only expect another 2.5 in or 5 cm growth after this happens.

Final height: Height to be attained is genetic. Boys can continue to grow until their early twenties. In girls, growth slows down after menstruation. However, it still possible for growth to continue especially if there is a history of tallness in the family. Hope that helps.