How should it look?

Materialsresins, ebonites, acrylics.

How thin or thick?  How long?  Size and what my pens look like next to more familiar brands.

NibsNot least important is the writing tip.

Section Shapes – How do you like to grip your pen?

FillingHow will you fill your pen with ink?

Steps? – That little shoulder on the barrel is called a step.  Will it fit your hand?

Clips & Roll Stops – Steel and custom options.

Rings and Bands – want to add some spice to your design?

Ink Windows – Do you need to see how much ink is left?

Vent Hole in Cap? – Regulate that air pressure.