V1CT1MS

Hello. I got interested in modding with Valheim and I'm trying a few things. The thing is I can't export an fbx small enough to fit on the character's head. The smallest re-scale I'm allowed is 0.001 which, apparently, is not enough. I'm not very used to Blender either so I guess I was hoping someone with experience on either Valheim, Blender or both could give me a hand. I'm basically trying to export a mask to fbx using custom mesh mod. I managed to see it in game but it's just too big. Is there an easier way to do it? Thank you beforehand for your time.