What are some good mini pens for a small home office?

JetPens.com includes the 3.1-inch-long Ohto Petit-B ballpoint pen and the 3.8-inch-long Fisher space pen bullet ballpoint pen on its list of top miniature pens. Cool Material recommends the Kaweco Liliput fountain pen and the Lamy Pico miniature pens.

The Fisher space pen bullet ballpoint pen measures 3.8 inches capped and 5.3 inches posted, and it doesn't leak at high altitudes. JetPens.com praises the striking design of the Kaweco Liliput fountain pen, a 3.8-inch mini pen that comes in extra fine, fine, medium and broad nib versions. The user can screw the cap of the Kaweco Liliput fountain pen onto each end of the pen.