Velma Child Costume - Small The childs Scooby-Doo Velma costume includes the shirt, skirt, wig and glasses. Our Velma comes in child sizes Small, Large, Medium. The child Scooby-Doo Velma costume is perfect for dress-up and imaginative play. This Velma is an officially licensed Scooby-Doo costume. Knee socks and shoes are sold separately from this kids Scooby-Doo Velma Halloween costume.