Viking Helmet in the style of Gjermundbu and Yarm

Adult Viking Helmet in the style of the Gjermundbu and Yarm helmets

Entirely made in Onshape, head size is "adult XL", 60 cm or 23.6 inch = hat size 7 1/2 US
I'm 6ft5 with a 62 cm head, and for me it is a "very snug fit"...
You could change the size by using the "scale" option in Bambu Slicer.
The helmet prints upside down to save filament and time, printing time 11 hrs.

And if you're looking for matching weapon, please take a look at my:

 Viking Bearded Axe 

Runic Dagger for Viking Cosplay

Large Knife (with Skull Handle)

Last photo is the original Gjermundbu helmet (by NTNU Vitenskapsmuseet - CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=61735327)