Diana's 1981 gown is big, beautiful, and very much of the era. The ivory dress incorporated 10,000 pearls and a 25-foot train! It was made out of silk taffeta and, judging by the sleeves and materials, was probably heavy to wear. The fabric was even made at a British silk farm, and the lace used for it traced back to Queen Mary.
Meghan probably won't opt for gigantic sleeves, but we could see her incorporating something old into her look, as Diana did.