This is a helmet in roman style for the popular dummy 13 model. It fits the standard head, and is an over head armor (much like a real one). This is a chamfered version that is a little more like the classic head and “boxy” style.

If you'd prefer a more rounded look, have a peek here: https://makerworld.com/en/models/440408

AMS profile is included, remove all the extra filament colors to print it as a single color / no AMS (as I have in the picture).

It uses variable layer heights to get the details near the top as good as possible within reason.

It takes roughly 20 mins to print in single color.