Fellow lefty, fountain pen user. Just my 2 cents if any other lefty reads this and takes the bold nib advice at face value: Although I prefer bold nibs, and th

Fellow lefty, fountain pen user. Just my 2 cents if any other lefty reads this and takes the bold nib advice at face value: Although I prefer bold nibs, and the reasoning of your comment is sound (bold is going to be smoother and easier to push, which is what lefties do on paper), you can definitely get away easily with medium nibs too as a lefty, unless they are badly tuned. Fine and extra fine sized nib are a matter of 1. taste in smoothness and line size, 2. how well tuned they are, and 3. hand writing position: I don't enjoy particularly the fine line they leave, but I have at least an extra fine (european, on a Diplomat Aero) that writes really well, and it has very little feedback when sliding on paper, to the point it's almost smooth (I prefer smooth over feedbacky) even left handed. There are cheaper pens on the market to try out different nib sizes, if one enjoys pens like I do, definitely find your favorite And these are the most common nib options, there's even more :)