This pen was kindly sent to me by Nino of Maiora Pens, the creator of these new Nettuno pens.

Measurements
Length (capped): 135.7 mm/5.34″
Length (uncapped): 130.6 mm/5.14″
Length (posted): 159.55 mm/6.28″
Diameter (barrel): 11.0 – 13.4 mm/0.43″ – 0.53″
Diameter (section): 10.9 – 11.3 mm/0.43″ – 0.45″
Weight (all): 39 g
Weight (cap): 12.5 g
Weight (body): 26.5 g