Kaweco ICE Sport fountain pen orange Pen Nib: M (medium) The Kaweco Sport closely follows an original 1935 Kaweco octogonal design Compact size feels just right in your hand, 4.1" long (104mm) closed, 5.2" long (132mm) open, and slightly over 1/2" in diameter (14mm) The cap screws securely on to close the pen and protect your pocket and the nib Utilizes the standard international size mini ink cartridge Made in Germany