Did the Japanese girl make herself bigger vs Holland? I don't think so.
This is O'Hara's position with the ball in flight in the first picture and then as it strikes her in the 2nd.
Here are 3 photos of the Japanese player, last one is different angle, couldn't find one of contact from first angle.
I would say the Japanese player has made herself wider, at least wider than O'Hara, doubt she did it intentionally.
I wasn't excited about the call against Japan, mostly because the player is so close to the ball.
The rule change as explained by Ifab technical director David Elleray, "We've changed it to say the body has a certain silhouette," said Elleray. "If the arms are extended beyond that silhouette then the body is being made unnaturally bigger, with the purpose of it being a bigger barrier to the opponent or the ball. Players should be allowed to have their arms by their side because it's their natural silhouette."
While O'hara's arm is not tight next to her side, it could pass as a natural silhouette for a player defending on the field.