The Most Minimalist Pen; Pen Uno

Everyday, the “-est” designs occur; “the biggest”, “the slimmest”, “the lightest” etc… Naturally, there are numerous different pen and notebook designs which we use in our daily lives.

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Pen Uno designed by ENSSO is a most minimal pen designed to be both a pleasure to write with and beautiful to see. With only 5.3mm (7/32in) in diameter it is one of the slimmest pens ever manufactured, yet it is very comfortable to use because its holding barrel is slightly wider. This barrel also serves as a twisting cap that protects the pen tip when not in use. Pen Uno is precision-machined out of space-grade aluminum and anodized in five distinct colors: space grey, silver, gold, rose gold, and red.

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The holding barrel doubles as twisting cap to protect the pen tip when not in use. A few turns of the cap will reveal the pen to be ready to write. The pen consists of four main components: the main shaft, holding barrel, end cap, and ink cartridge (Hi-Tec-C Coleto). The end cap of the pen can be removed using a flat head screwdriver to change the ink cartridge. You can also use any other flat object or even your nail.


  • All aluminum construction (anodized)
  • Length: 13cm (5 1/8in)
  • Width: 5.3mm (7/32in)
  • Weight: 10g (similar to a standard pencil)

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