In this extra-long, cozy “Friday night in” kind of video, I pulled out my Esterbrook nib lineup and went full nerd mode—in the best way. I walk you through Esterbrook 101 first (the pen models I’m using and why), then we get into Nibs 101, including how the Esterbrook-branded JoWo nib units work and what’s actually interchangeable. I also do a quick pen walkthrough so you know exactly what you’re looking at before we start putting nibs to paper. After that, it’s writing sample time: I test 16 nibs with side-by-side comparisons, starting with the standard Extra Fine, Fine, Medium, and Broad, then moving into more specialty territory. You’ll see a Broad with a special grind, flex options (including vintage-style flex and a 1.1), and a whole set of custom grinds like the Journaler, Needlepoint, Scribe, Techo, Mini Stub, and Fude Flex. I wrap up with my general thoughts, my personal favorite flex nib, and line measurements—because yes, I measured them. If you’ve been curious about what Esterbrook nibs actually look like on the page for journaling and planners, this is the full collection tour.