Using TheBrokenNerd83's design (https://www.thingiverse.com/thing:3578797), I printed the helmet in different sizes and tried to use as little support structure as possible. I share my experience with you in the video. 

This Video shows you how and with which settings you can print with a Prusa i3 MK3 the right size of the Mandalorian helmet and how to finish it. Small, Medium and Large, fast and in good quality -with as little support structure as possible.

Mando helmet sizes

• Large: 100% original size
  • Inside dimensions 24x20cm - Head circumference up to max 59cm
  • Six-piece with sparing
• Medium: 91% original size
  • Inner dimensions 22x18cm - Head circumference up to max 54cm
  • Three-piece without support structure in the middle
• Small: 84% original size
  • inner dimensions 20x16cm - head circumference up to max 52cm
  • One-piece without support structure in the middle

The Mandalorian Helmet Design by TheBrokenNerd83
https://www.thingiverse.com/thing:3578797