This pen was kindly sent to me by BENU and it can be bought here.

Length (capped): 141.36 mm/5.56″
Length (uncapped): 125.06 mm/4.92″
Length (posted): 166.03 mm/6.53″
Length (section): 21.55 mm/0.84″
Diameter (barrel): 13.79 – 15.72 mm/0.54″ – 0.61″
Diameter (section): 9.79 – 11.18 mm/0.38″ – 0.44″
Weight (all): 25 g
Weight (cap): 10 g
Weight (body): 15 g