Polystyrine charms with protective coating to prevent paint chipping. Charm is water-resistant, but not entirely water-proof. The silver chain is 18" with a barrel clasp.
Due to the nature of the show's animation, the charm's mirror image is also canonical. If you have a preference (the necklace shown or it's mirror), please let me know in the comments. If not, I will send the first available!
Rainbow Dash + cutie mark design is (c) Hasbro.
Check out the store for other MLP items, such as other cutie mark necklaces, or complete your cosplay with ears and wings!