According to my notes she wore the ruby parure in 1954 (sorry, I didn't note the source for this). So for a child of about 10 years old it is absolutely ok to be overwhelmed by such a parure. IIRC, the Princess herself once told in an interview that they still had an original dress of Queen Desiree, and Princess Benedikte was the only one to fit the dress of that tiny queen. So she got the role.
Thanks for the lovely banner honouring the birthday of Princess Benedikte. By the way, she wore one more tiara at at least: at her engagement party she borrowed the Baden Palmette tiara. bilder kostenlos