Maybe there isn't much to be said about this picture, but are there clues to date this to a certain period of time (or even decade)?
It's a photo of a young girl on a postcard, no further information on the back side. The edge is jagged.
I guess she's 12 years old as she's clearly wearing her confirmation dress.
I know that you dating specialists here know everything about English fashion, and this is Flemish (Belgian), but you never know...