In this Child Mustard Costume , not only does your child have permission to play with his food — he can become it! Our mustard costume, complete with a yellow foam body suit and cone hat, is designed to make your little one look just like a standard mustard dispenser. Just be careful not to squeeze him too hard! Makes a great Halloween costume for boys and girls. Size: 7-10. Availability: This Child Mustard Costume takes approximately 1-2 business days to leave the warehouse plus transit time.