-Earring hooks are hypoallergenic stainless steel. Comes with a rubber backing
-Charms are made out of heavy duty plastic (NOT shrink plastic). Waterproof and very durable. They have a glossy sheen to them and are scratch resistant. The image is printed on the front. The back is white.
Miyagi-Do Karate- 1 3/4" by 1 1/2"
Cobra Kai- 1 1/2" by 1 1/2"