A fan made Pokémon Kanto Boulder Badge.
After defeating Brock, a Rock-type Pokémon leader in Pewter City Gym, Ash gets a Boulder Badge.
This is a fan made replica.
Pin diameter = 1.2mm (0.05”).
Although it seems a little bit thick for a pin, this is the minimum requested by ShapeWays to guarantee resistance of the material.
It can be used with a rubber cap or butterfly clutch (not included).