Summary This is Captain Rex's Helmet Phase 2. This is kind of part of my Mandalorian helmet series. This is what happens when a Mandalorian helmet and a storm trooper have a baby. The hole on the bottom to fit your head is way to small with these types of helmets. To fix this, part 7 and part 18 could be use as a piece that can be attached with magnets. This helmet was sized for an adult male. Check the pdf file for dimensions. Units are in millimeter. PS - This is my favorite clone trooper helmet.