The Nib Guide
Sizes, grinds, flex, and fixes — the part of the pen that decides everything.
Every fountain pen question eventually becomes a nib question. Size sets your line; grind sets its character; tuning decides whether the whole instrument sings or scratches. This hub collects the sizing translations (Japanese F ≈ Western EF), the grind footprints, and the ten-minute fixes that rescue most "bad" pens.
The desks
Key terms
Common questions
Reader favorites
The short list — see the full ranking on the best-pens desk.
Kaweco pen pouch
$26.96
Check priceFaber-Castell Loom fountain pen
$81.59
Check priceOpus 88 Koloro fountain pen
$139.50
Check price
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63 guides on the desk
42 pens & inks vetted
2,315 reader price checks
The specimen press
Original nib & ink art, made to order.
