Cleo De Nile Child Costume - Medium This Monster High Cleo De Nile costume includes a shirt with attached overshirt, pants, belt, armband and gloves. Our Cleo De Nile costume comes in child sizes Medium, Large, Small. This Cleo De Nile costume is an officially licensed Monster High costume. The shoes, jewelry and headpiece are not included with the girl+#039;s Cleo De Nile costume.