Unicorn Big Head Costume

Select Size:

$89 Sale $43.99

Earn $25 back in rewards* for every $250 spent with your Pottery Barn Credit Card.

Learn More

This whimsical costume will transform your big kid into a unicorn with the fun oversized mascot head! Featuring a supersoft felt-lined tunic and a spacious, comfy mask, each piece is made of quality materials so it lasts through years of dress-up. Its lightweight mask is designed for visibility and easily attaches to the tunic with Velcro. Enchanting details like an iridescent horn and a furry mane and tail make this costume all the more magical. Plus, it’s hypoallergenic so it’s safer for kids.


  • The head piece is easy for kids to to put on and take off on their own. Our big head costumes are breathable and have excellent visibility from inside.
  • The fabric is rigid enough to stand on its own and rest on their shoulders.
  • Includes fun dimensional details like the softly padded headpiece and soft-to-the-touch mane and tail.
  • Our costume is finished in garment-quality stitching and construction so it can be handed down to siblings and worn for years to come.
  • One-piece design includes oversized head attached to shirt.
  • Made from 100% textured polyester velour, soft boa and faux fur.
  • Costume is yarn-dyed – Fibers are treated individually with environmentally safe dyes before weaving to offer vibrant, lasting colors.
  • Pants and undergarments are not included.


  • Pottery Barn Kids exclusive.
  • Costume coordinates nicely with the Unicorn Light-Up Treat Bag or the Rainbow Light-Up Treat Bag (both are sold separately).
  • Sizes 3T, 4-6 years, 7-8 years and 9-10 years.
  • See size chart.
  • Spot clean.
  • Imported.
Dimensions & Care


Size 3T
  • Neck: 5.5" wide
  • Chest: 13.5" wide
  • Shoulder (seam to seam): 10.75"
  • Sleeve: 19.5" long
  • Armhole: 4.75"
  • Shirt Length: 19"
Size 4–6
  • Neck: 6" wide
  • Chest: 15" wide
  • Shoulder (seam to seam): 12"
  • Sleeve: 22.5" long
  • Armhole: 5.5"
  • Shirt Length: 22"
Size 7–8
  • Neck: 6.5" wide
  • Chest: 16.5" wide
  • Shoulder (seam to seam): 13.25"
  • Sleeve: 24.5" long
  • Armhole: 6"
  • Shirt Length: 23.5"
Size 9-10
  • Neck: 6.5" wide
  • Chest: 18" wide
  • Shoulder (seam to seam): 14.75"
  • Sleeve: 25.5" long
  • Armhole: 6.5"
  • Shirt Length: 24.75"


  • Spot clean with a damp, white cloth.
  • Blot to remove excess water.
  • Air dry.
Shipping & Returns


Standard UPS can deliver most in-stock items within 3-5 business days.


  • Available within the contiguous 48 states
  • An extra charge of $26 per address. 
  • Order by 6pm PT Monday through Friday, you'll receive your order the next business day
  • Orders placed on Friday after 6pm PT through Sunday will arrive on Tuesday.
  • Monogrammed items take additional days for delivery.  A delivery estimate will be quoted on your Payment & Review page.


Select oversized items have an additional delivery and processing surcharge; this charge is listed below the item price.

View our complete Shipping and Delivery.


Eligible items can be returned for a refund of the merchandise value within 30 days of receiving an order or 7 days for Quick Ship upholstery items. An original receipt or gift receipt is required.


  • Stores - You can return most non-furniture items to your local Pottery Barn Kids store for free.
  • By Phone - For non-custom furniture and other oversized items, call Customer Service at 1-800-993-4923
  • By UPS - print a return label from our Returns Policy page and bring to a UPS location.


Delivery fees are non-refundable and prior purchases are not eligible for a price adjustment.

  • Monogrammed/Personalized items
  • Made to Order items, including custom rugs and furniture
  • Mattresses
  • Gift cards
  • Final sale items (with prices ending in $.X7 or $.X9)
  • Items damaged through normal wear and tear


For assistance please contact Customer Service at 1.888.922.4119, 7 days a week, 5:00 am - 9:00 pm (PST). We cannot accept returns on final-sale items ending in .99, monogrammed items or items damaged through normal wear and tear. Made-to-Order furniture or rugs are not eligible for returns. Delivery fees are non-refundable.


View our complete Returns Policy.

Find & Pick a Store

Tap here to close

The location you specified seems to be incorrect. Please enter a valid address or ZIP code.

Stores Nearby:

  • Populating store list please wait.

There are no stores within miles of you.

Try entering a new location or adjusting the distance.

Prices and promotions may vary in stores. We make every effort to give you current product availability information, but our store inventory is always changing so an item's availability cannot be guaranteed.