This blueprint visualizes the commonly used sizes for a pizza slice. Basically, at the equator there are 1000 tiles, so commonly used fractions of 1000 are used as planet slices for blueprints. I've put in here the slices for 1/20, 1/10, 1/5, 1/4 and 1/2 hemisphere.

This is just a visualization of how to divvy up the planet.