This dress was designed from a vintage pattern (Simplicity, copyright 1974).
These bloomers are a new pattern but I added the ribbons on the legs.
Since the sisters these were made for are 6 and 2, their dress designs were best to be different, while utilizing the same fabric. Big Sister chose the dress design she wanted. It was originally meant to look like the Kit Kittredge (American Girl) journalist dress.
And for good measure: A dress for Big Sister's American Girl doll to match.