This pen was kindly sent to me by Salvatore of Leonardo Officina Italiana – grazie mille!

Measurements
Length (capped): 140.4 mm/5.52″
Length (uncapped): 126.9 mm/4.99″
Length (posted): 165.4 mm/6.51”
Diameter (section): 10.7 – 12.3 mm/0.42″ – 0.48″
Diameter (barrel): 12.3 – 14.5 mm/0.48″ – 0.57″
Weight (all): 25 g
Weight (cap): 5 g
Weight (body): 20 g