This pen was kindly lent to me by Joost Appelboom – thank you!

Measurements
Length (capped): 136.3 mm/5.34”
Length (uncapped): 130.4 mm/ 5.13”
Length (posted): 157.7 mm/6.20”
Diameter (section): 10.8—12.2 mm/0.42—0.48”
Diameter (barrel): 9.8—12.0 mm/0.39—0.47”
Weight (all): 22.0 g
Weight (body): 14.5 g
Weight (cap): 7.5 g