Hippo Costume
Bring big, friendly river-horse energy to your next costume party.
The hippopotamus is a beloved, bulky semiaquatic mammal known for its massive size and round silhouette. People choose this costume for its cute, humorous appeal and cozy comfort. The classic look consists of a soft gray body, a snout-nosed headpiece with small ears, and felt teeth.
- Difficulty
- Easy
- Time
- ~20 min
- Budget
- $25–60
Try it on
See yourself as Hippo
One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.
One render, $1. No account needed — if it fails you're not charged. Pricing.
Your photo is sent to Google's Gemini API to make the render and isn't used for training. Renders are AI-generated and labelled.
Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.
What you need for a Hippo costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Hippo costume — one box instead of 4 pieces.
Gray plush onesie or jumpsuit
A soft, oversized gray fleece jumpsuit with a hood to form the base of the hippo body.
DIY: Use an oversized gray sweatshirt and matching gray sweatpants.
Hippo hood or headpiece
A padded gray hood featuring small round ears, pink inner lining, and a wide snout with white felt teeth.
DIY: Glue pink and gray felt ears and white felt teeth onto the hood of a gray sweatshirt.
Gray shoe covers or fabric booties
Simple gray fabric covers that slip over your regular shoes to look like round hippo feet.
DIY: Wear solid gray socks over your shoes, or use gray felt to wrap around your sneakers.
Pink felt belly patch
An optional oval patch of light pink felt to add contrast to the center of the stomach.
DIY: Cut a large oval out of pink felt and safety pin or fabric-glue it to the front of your gray outfit.
Rather not assemble it? See ready-made Hippo costumes at Spirit Halloween ↗
How to put it together
- 1
Put on your base layer of comfortable, lightweight clothing underneath.
- 2
Step into the gray plush onesie and zip or button it up to the chest.
- 3
If using a separate headpiece, secure it under your chin; otherwise, pull up the attached hood.
- 4
Adjust the snout and ears so they sit clearly on top of your head without blocking your vision.
- 5
Slip the gray shoe covers over your sneakers, securing any elastic straps underneath.
- 6
Add a small pink felt circle to your nose using face paint or skin-safe adhesive for an extra cute touch.
Makeup & hair
Keep hair tied back flat under the hood. If desired, paint a small pink circle on the tip of your nose and add simple black whisker dots on your cheeks using face paint.
Hippo for couples, groups, kids & more
- couples
- Pair up as a Hippo and a Crocodile for a classic African river theme.
- group
- Go as a pack of 'Hungry Hungry Hippos' by wearing different colored hippo onesies (gray, pink, blue, yellow) and carrying small plastic balls.
- kids
- A plush, sleeveless bubble-body suit with an elastic bottom and a soft Velcro-fastened hood keeps toddlers warm and mobile.
- Plus size
- Inflatable hippo costumes or oversized fleece onesies offer an incredibly comfortable, forgiving, and naturally bulky fit.
- pet
- A lightweight gray dog hoodie with soft felt teeth and ears sewn onto the hood.
More ways people search for this costume
The most-searched variations of “Hippo costume”, and how this look adapts to each.
Hippo costume for dogs
- A lightweight gray dog hoodie with soft felt teeth and ears sewn onto the hood.
Tips
- Onesies can get very warm indoors, so wear a light t-shirt and shorts underneath.
- If you are using a DIY cardboard box head, make sure to cut wide eyeholes covered in black mesh for visibility.
- For photos, pose with your hands up like paws and your mouth wide open in a classic hippo yawn.
Hippo costume FAQ
- How do I make a DIY hippo costume without sewing?
- Wear a gray hoodie and sweatpants. Cut teeth and eyes out of felt sheets and use fabric glue or safety pins to attach them to the hood.
- What is the easiest hippo costume to buy?
- A full-body plush hippo onesie is the easiest option because it is a single piece, highly comfortable, and widely available.
- Is a hippo costume suitable for cold weather?
- Yes, fleece onesies and plush jumpsuits are excellent for cold Halloween nights as they easily layer over warm clothes.
Did you know? The word 'hippopotamus' comes from the ancient Greek words for 'river horse,' despite the animal being more closely related to whales and dolphins than horses.