Jo(sephine) Lukito on Twitter: "Finally--I included the Muji gel pen 0.38mm (the smallest tip I am aware of). It's not technically an "extra fine" tip, but it's a great beginner pen for
Amazon.com : MUJI Clear Ballpoint Gel Pen [Blue-black] 0.5mm x 5 : Office Products
Muji Gel Ink Ballpoint Pen - 0.38mm – PaperPlantCo
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Amazon.com: MUJI Gel Ink Ball Point Pen 0.5mm Black color 10pcs : Office Products
Moma Muji Gel Ink Ballpoint Pen, Blue Black Ink, 0.38 mm / 0.5 mm / 0.7 mm, Set of 3 & Japanese Sticky Notes Value Set (Japan Import) - Buy Online - 47337008