A simple reminder about two forthcoming Dianas — Kristen Stewart in Pablo Larrain‘s Spencer and Elizabeth Debicki in the currently shooting season #5 of The Crowd. They are separated by 10 inches of height, Debicki being 6″3″ and Stewart 5′ 5″.
Diana herself stood 5’10” so Debicki and Stewart are separated by 5 inches in both directions.
Secondly, everyone recalls that 1988 video in which Prince Charles and Diana danced on a ballroom floor in Australia. Charles is roughly 5’10” or clearly an inch or two shorter Diana in heels. (If she wore flats they’d have been the same size.)
Be advised that in Spencer, the 5’8″ Jack Farthing plays Prince Charles — three inches taller than Stewart. It’s likely that Stewart wore platforms in every stand-up scene and that Larrain avoided shooting them standing side by side.