A lineup of TWSBI fountain pens with different nib sizes, illustrating how EF, F, M, and B nibs vary in appearance and writing style.
Image of TWSBI fountain pens in multiple nib sizes, arranged on top of a notebook with handwritten ink samples. This photo highlights the differences between extra fine, fine, medium, and broad nibs, making it ideal for illustrating Pen Chalet’s nib size guide.
