Hello, Yobanec! Thank you so much for your questions.
How very lucky you were to have scored a dining reservation at
Cinderella's Royal Table. It's definitely one of the most sought after dining experiences at the
Magic Kingdom - even in all of Walt Disney World.
I would allow about an hour for your breakfast there. Between enjoying the wonderful meal and the incredible atmosphere, you'll want to make sure you see all of your princess visitors, snap some photos, maybe get an autograph. It'll take a while just to have everyone come to your table. An hour is a pretty safe bet.
As for attire, because the restaurant is in the middle of the theme park, you'll find most guests are in theme park attire - shorts, t-shirts, tank tops, even flip flops. A lot of the little girls like to come dressed in their own princess gowns and accessories, but your non-royal folks are just dressed as they would be for a day at the Magic Kingdom.
I hope you enjoy an absolutely amazing meal, Yobanec!
Anna