The Adult Poseidon Costume is enough to have everyone tremble at your might! The tunic, belt, sash, and crown — all with an ocean motif — of the Poseidon costume will give you the confidence you need to control the high seas. Even if your Halloween celebrations are on dry land, your power in the Poseidon costume cannot be denied! One size fits most. Availability: This Poseidon Costume takes approximately 1-2 business days to leave the warehouse plus transit time.