Graphic novelist Jim Woodring has created a very large dip pen pen and will give a public demonstration this month.
From Scott Thrill's article about Jim Woodring at WIRED:
Artist and cartoonist Jim Woodring has a professional fetish for the pen and inkwell. So he’s built a 7-foot-tall version to show off to noobs and silence fluid-dynamics doubters.
His outsize version of the traditional steel dip pen, with its lengthy poplar handle, is a calligrapher’s inky dream. It features a brass-plated, hand-engraved, 16-inch steel nib and comes with an inkwell vase filled with blended acrylic ink.
The rest is here.
About a foot of the 7 foot pen is this nib.
Hat tip to Adrian Sinnott!