Let’s have a closer look at one of my personal fountain pens with a lovely titanium nib.

Measurements
Length (capped): 150.5 mm/5.92″
Length (uncapped): 130.5 mm/5.14″
Length (posted): N/A
Diameter (section): 10.6 – 13.8 mm/0.41″ – 0.54″
Diameter (barrel): 13.2 – 15.5 mm/0.52″ – 0.61″
Weight (all): 42 g
Weight (cap): 26 g
Weight (body): 16 g