If you’re interested in pen size and dimensions there are a number of online sources of information.
- VintagePens.com’s Pen Measurements for vintage and modern pens.
- Nibs.com’s Fountain Pen Measurements and Comparisons (Nakaya, Sailor, Omas, Pilot/Namiki, among others sold on that site).
- Nakaya has measurements with a handful of standard comparisons.
- RichardsPens.com has wonderful size illustrations for pens such as Aurora, Bexley, Gate City, Pelikan, Pilot/Namiki, among others sold via that site.
- The Calgary Pen Club has an excellent database of measurements.
- For Edison pen measurements, EdisonPen.com is the best source.
- For Danitrio measurements, take a look at these two Fountain Pen Network posts as well as the Danitrio website.
- My Dani Trio Hanyro landed today: scroll down to posts 6 and 7
- Danitrio Pen Sizes? (excellent comparison photos)
- Danitrio website
- FPN’s fountain pen review subforum often has relevant information about pen size.
Some of my thoughts about ink capacity are here.