Taller than I thought... WAY taller!

I saw a snapshot of Katherine standing next to Alison Sudol off-screen and she TOWERED over Alison whereas she didn't seem that much taller on screen in Fantastic Beasts. So I looked up her height here - 5'11½''! My jaw dropped. Considering she's only up to Eddie Redmayne's eye-line on screen, I'd have pegged Katherine at 5'7''. Has someone somewhere made a slight mistake that's been often repeated?