Good point. I am sort of medium, FWIW. I figured I could send these kinds of detail to anyone who might be interested. Except for my UO-8 which I bought new back in '72, the rest were built up by me from bare frames.

I measured a few just now.
The Bianchi Brava seat tube is 59cm C-T, head tube 57cm C-C.
The Grandis seat tube is 56 C-T, head tube 55 C-C.
The PF-10 seat tube is 58 C-T.
IIRC, the UO-8 seat tube is 24 in.
So they vary a bit but are all sort of medium.

All have decent or very good components such as Suntour Cyclone GT Mk1 or VGT-Lux RD's, the sort that might have been original or a contemporary upgrade. All have DT shifters, mostly custom 2x6, 1/1/2-step gears with emphasis on climbing New England hills rather than mashing hard at high speed. One is indexing 7-speed (IIRC). One or two have 165mm cranks, IIRC, generally 110BCD from Sugino or fancier cranks from Velo-Orange or similar. The Gazelle is made with 531-C tubing, and it an easy bike to ride hard for a long distance. The Italians are Columbus though I'd have to look at their stickers to see what variant, SL perhaps. I built most, perhaps all, of the wheels. The Grandis and Tommasini have 22mm (or is it 23mm?) Veloflex clinchers. The other high-end bikes have 22mm Veloflex sew-ups, or possibly Vittoria. The Bianchi is set up as a utility bike with a generator front hub; I commuted at night with it.

I have ridden all of them up Cadillac Mt in Acadia National Park, Maine. Those of you who have followed this C&V forum in the past would recognize all of them, I am sure.