Scooby Doo Branded Pajama One Piece or Halloween Costume

BRAND and ITEM: Scooby-Doo One Piece Pajama or Costume CONDITION: Good preowned MATERIAL: Polyester COLOR: Brown SIZE: Large OTHER: Front zip; hood and tail; jogger type elastic at ankles; no flaws. Unsure if it's an adult or a child's large. I think for a child - see measurements below. APPROXMIATE MEASURMENTS LAYING FLAT: 18 inches armpit to armpit 22 inch inseam.