This should be able to fit up to a 23-inch head easily but you should check the scale before you print just to be sure.
**Updated 04/03/2016 -- Fixed visor to remove small gap.
Samus_-_No_-_Visor.stl | 22.9MB | |
Samus_-_Visor.stl | 231.3KB | |
Samus_Helmet_V2.stl | 23.1MB |