Maggie M\'Gill says on 16/May/11
I met her on numerous occasions, and Janis wasn't all that much shorter than me, and I'm 5'8 barefoot. I'd say between 5'6 and 5'7. Also may I point out that people often list old heights on their official documents, not having being recently measured so they go by the last height they remember, maybe from high school even, but really they've grown.