{"id":9453,"date":"2025-09-22T17:17:45","date_gmt":"2025-09-23T00:17:45","guid":{"rendered":"https:\/\/www.penchalet.com\/blog\/?p=9453"},"modified":"2026-04-23T18:05:57","modified_gmt":"2026-04-24T01:05:57","slug":"how-to-choose-the-right-nib-size-for-fountain-pens-complete-guide-2025","status":"publish","type":"post","link":"https:\/\/www.penchalet.com\/blog\/how-to-choose-the-right-nib-size-for-fountain-pens-complete-guide-2025\/","title":{"rendered":"How to Choose the Right Nib Size for Fountain Pens (Complete Guide 2025)"},"content":{"rendered":"\r\n

When you\u2019re buying your first fountain pen\u2014or even your fifth\u2014one of the most common questions is: \u201cWhich nib size should I choose?\u201d With dozens of options and brand-to-brand variations, it can feel overwhelming. This guide cuts through the confusion so you can make a confident choice, whether you\u2019re new to fountain pens <\/a>or expanding a growing collection.<\/p>\r\n\r\n\r\n\r\n

What Is a Fountain Pen Nib?<\/h2>\r\n\r\n\r\n\r\n
\"Close-up<\/a>\r\n
A Benu fountain pen nib paired with Clairefontaine Inkebana notebooks \u2013 showcasing fine writing tools and premium paper.<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

A nib is the metal tip of a fountain pen that touches the paper. Nibs come in different sizes, usually labeled Extra Fine (EF), Fine (F), Medium (M), Broad (B), or Stub (1.1). They can also be found in less common nib sizes like italic, stub 1.5, flex, etc. Each nib size determines how thick or thin your written line appears.<\/p>\r\n\r\n\r\n\r\n

Why Does the Size of the Nib Matter?<\/h2>\r\n\r\n\r\n\r\n
\"TWSBI<\/a>\r\n
A lineup of TWSBI fountain pens with different nib sizes, illustrating how EF, F, M, and B nibs vary.<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

Your nib size directly affects:<\/p>\r\n\r\n\r\n\r\n