-Earring hooks are hypoallergenic stainless steel. Comes with a rubber backing. There is also a stainless steel clip on option
-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
-Measurements: 1 1/2" by 1 1/2"
