A) In the early days the various sheet film sizes were called by their size.
B) Roll film arrived and was designated by various numbers, like the surviving 120 and barely surviving 127 and dead 116. The 127 size got the moniker "vest pocket" size.
C) Barnack uses cine film and it becomes known as miniature format.
Of course, I might have that totally screwed up. Counting on me to be the historian is a fools game.