Ooh! I eagerly await your findings!
 
Verdict:

There's no height listed on IMDB for Ainley, so I can't resolve that particular debate, but given that Davison's 6'1", Baker the Second's 6'0", and McCoy's 5'6", I'm betting that Five and Six are about the same height as if not a bit taller than Ainley!Master.

Paul McGann's listed as 5'8"; Eric Roberts is 5'10". So that gives us only two Doctors that have been smaller than their respective Masters.

Why is everyone on this show so taaaaaaaall. < /short-person rant>
 
So that gives us only two Doctors that have been smaller than their respective Masters.

Eenteresting. I'm sure there's detailed meta to be written on that subject!

Why is everyone on this show so taaaaaaaall. < /short-person rant>

The companions! The companions are generally a lot shorter than I thought! (I think?)

I'm precisely the same height as Delgado, which is... not a sentence I'd ever anticipated typing, I've gotta say. Hee.
 
I am somehow reminded of the "Visible Napoleon complex" macro even though that caption was applied to McCoy.

If nothing else, at least Adric was probably fairly small. :) Zoe too, I think.

(But then, I'm precisely one foot shorter than Colin Baker. Everyone looks tall to me. :D)

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