Sully and Boo Costume
Bring Pixar's most heartwarming duo to life with this cozy costume.
Sully and Boo from Pixar's Monsters, Inc. make one of the most beloved and recognizable couples or duo costumes. Perfect for couples, friends, or parent-child pairings, this look combines Sulley's fuzzy blue monster aesthetic with Boo's simple, iconic pink oversized tee and pigtails. It is incredibly comfortable, easy to put together, and instantly recognizable.
- Difficulty
- Easy
- Time
- ~30 min
- Budget
- $30–90
Try it on
See yourself as Sully and Boo
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 Sully and Boo costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Sully and Boo costume — one box instead of 5 pieces.
Sully Plush Onesie
A bright turquoise blue fleece zip-up jumpsuit featuring purple spots, a stuffed tail, and an attached hood with horns and Sulley's face.
DIY: Wear a turquoise sweatshirt and sweatpants, and fabric-glue purple felt circles onto them.
Oversized Pink T-Shirt
A plain, bright pink crewneck t-shirt that fits loosely like a dress, reaching mid-thigh.
DIY: Buy a plain pink men's 2XL t-shirt.
Purple Leggings
Form-fitting purple or lavender leggings or tights to wear under the pink shirt.
DIY: Use any dark purple sweatpants or tights you already own.
Pink Ball Hair Ties
Two large, pink bubble-style hair ties or pom-pom hair bands to secure high pigtails.
DIY: Wrap pink yarn or pink ribbons around standard hair elastics.
White Sneakers
Simple, clean white canvas sneakers or slip-on shoes to complete Boo's casual kid look.
DIY: Use any plain white athletic shoes.
Rather not assemble it? See ready-made Sully and Boo costumes at Spirit Halloween ↗
How to put it together
- 1
For Sulley: Step into the turquoise spotted onesie, zip it up, and pull the hood over your head so the horns and face are visible.
- 2
For Boo: Put on the purple leggings or tights.
- 3
Pull the oversized pink t-shirt on over the leggings, ensuring it fits loosely like a tunic or short dress.
- 4
Part Boo's hair down the middle and tie it into two high, symmetrical pigtails using the pink bubble hair ties.
- 5
Put on the white sneakers to complete Boo's look.
- 6
Stand together to complete the iconic Pixar duo dynamic.
Makeup & hair
Sulley requires no makeup if using a hooded onesie. For Boo, style hair into two high pigtails secured with pink bubble ties, keeping the look fresh-faced and youthful with minimal, natural makeup.
Sully and Boo for couples, groups, kids & more
- couples
- One person wears the Sulley onesie, and the other dresses as Boo in the pink shirt and pigtails.
- group
- Add Mike Wazowski wearing a lime green shirt with a large single eye drawn on, or Celia Mae with a purple dress and snake hair.
- kids
- A toddler can wear a plush purple monster costume to replicate Boo's disguise, while an adult wears the Sulley onesie.
- Plus size
- Onesies are naturally loose-fitting; look for oversized fleece options or use a matching turquoise sweat suit set.
- pet
- Dress a small dog in a green Mike Wazowski tee or a tiny purple monster knit hat.
Tips
- Choose a fleece onesie for cold outdoor trick-or-treating, or a lightweight cotton version for warm indoor parties.
- If Boo's pink shirt is too short, wear matching pink or purple bike shorts underneath for extra coverage.
- Carry a small plush toy of Mike Wazowski or a yellow 'Scream Canister' water bottle as a fun, functional prop.
Sully and Boo costume FAQ
- What does Boo wear in Monsters, Inc.?
- Boo wears an oversized light pink t-shirt, purple leggings, white sneakers, and her hair in two high pigtails secured with pink ball hair ties.
- How can I make a DIY Sulley costume?
- You can use a turquoise blue hoodie and sweatpants, then cut out purple felt circles and fabric-glue them all over the outfit. Add two stuffed felt horns to the hood.
- Is this costume good for cold weather?
- Yes, the Sulley fleece onesie is very warm, and Boo's leggings and t-shirt can easily be layered with thermal underwear underneath.
Did you know? In Monsters, Inc., Boo's real name is Mary, named after her voice actress, Mary Gibbs, who was a toddler during production and was recorded playing around the studio to get natural dialogue.