Round Nibs: A round nib is ground and polished to have roughly a circular footprint, so that its line width is fairly uniform no matter what direction the nib is moving across the paper. Here is a magnified silhouette representing the basic shape of a round nib, together with a cross illustrating the uniform stroke width that this nib produces. All our standard nibs are Round Nibs Stub Nibs: A stub nib is elongated sideways, to have a footprint that is somewhat elliptical. This makes it lay down a slightly broader line when moving up and down (in relation to the nib itself) and a narrower one when moving sideways (again, in relation to the nib). The wider line is between 1.5 – 2.5 times thicker than the thinner line in our custom ground stub nib. The eccentricity of the ellipse isn’t too pronounced, and the nib is still polished to have nice rounded edges. This means that you can write with a stub just about as easily as with a standard nib. Here is a magnified silhouette representing the basic shape of a stub nib, together with a cross illustrating the slight variation in stroke width that this nib produces: Italic Nibs: An italic nib is much more elongated. This makes the difference between its broad (up-and-down) strokes and its narrow strokes (sideways) much more pronounced than with a stub.  A traditional italic nib has a perceptible straight edge across the tip, and relatively less rounding to the edges than a stub nib. This results in a greater tendency to catch on corners and to skip if the nib is not held straight-on to the paper. This can make the nib feel “scratchy”. However, there is a compromise grind called cursive italic, which has more rounded edges than a traditional italic. When properly ground and finished, a cursive italic nib can produce stroke variation almost as strong as an italic nib while the writing feel is nearly as smooth as a stub of similar width. All our custom ground italic nibs are cursive italics unless otherwise requested. See diagram here.