I’ll be honest, I wouldn’t have worn them as lapel pins even if they were the right size.
But yes, they’re looking more like backpack buttons at this scale.
Again, we do not have any coins to give a sense of scale.
The only other crowdfunding campaign I’ve participated in was for 6mm terrain meant for Epic 40,000. The designer was German, and to help all his likely customers he posted renderings of his terrain next to a Euro, a Pound, and, for us Americans… a half dollar. I know my dad has a couple somewhere, but I haven’t seen one in decades. It was thoroughly unhelpful, just like this anecdote.