Kaweco's Mini Special S(hort) click ballpoint is convenient and pocketable.
Ballpoint comes outfitted with a blue 1.0mm medium point D1 type refill. Replacement Kaweco D1 refills are available in black and blue in line widths of 0.8mm (fine), 1.0mm (medium), and 1.2mm (broad).
An optional clip is also available.