Some people prefer a slightly thinner pen and this model is designed with a 13mm cap thread which translates into an ~15.5,, cap outside diameter and ~12.6mm barrel with tapering to each end of a couple of millimeters.

Inspired by the infamous President Dwight D Eisenhower the 34th President of the United States. This bespoke pen can be offered with a variety of fountain pen nibs and includes a miniature Eisenhower Dollar in the finial.  

General Specifications:

• 13mm cap threads
• ~140mm (5 - 1/2") capped length
• ~135mm (5-1/4") uncapped length 
• Cap Diameter: 16mm
• Barrel Diameter: 13.5mm
• Section Pinch: 10.8mm