I exported the party hat model using the Model Exporter Runelite plugin. I loaded it into Fusion 360, cleaned up the mesh, then gave it thickness.
I included 3 stls:
At 100% scale, the "hat brim" is ~195mm front to back and ~173mm side to side. Keep in mind that several of the points are angled outward so that may impact print volume.
I would recommend increasing the parameter count until there is no infill and printing with a brim. I didn't print a head-sized version but the one in the picture is the thicker version at 25% scale. I printed it on a Prusa Mk4 in Prusa azure blue PLA using the 0.2mm layer height structural input shaper profile.
The author marked this model as their own original creation.