Here are two Esterbrook nib reference charts. They can help determine the qualities, shape, ink flow and usage for each of the Esterbrook nibs that are available.
Matt is a Systems Development Director for a multinational franchise. Matt has lived and worked in Hawaii, Chicago, South Florida and currently resides outside of Atlanta. He enjoys his hobbies including Technology, Gadgets/EDC, Fountain Pens, Wetshaving, Clocks, Antiques & Coffee. He even roasts his own coffee weekly.