Sulley and Boo Costume
Bring Pixar's most heartwarming monster duo to life this Halloween.
Sulley and Boo from Monsters, Inc. make one of the most beloved and recognizable duos in animation history. Perfect for couples, friends, or parent-child pairings, this look contrasts a giant, furry blue monster with a sweet, oversized pink t-shirt outfit. It is incredibly comfortable, instantly recognizable, and easy to put together.
- Difficulty
- Easy
- Time
- ~30 min
- Budget
- $40–120
Try it on
See yourself as Sulley 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 Sulley and Boo costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Sulley and Boo costume — one box instead of 5 pieces.
Sulley Blue and Purple Onesie
A plush, turquoise-blue hooded jumpsuit featuring purple spots, a stuffed tail, and a hood with Sulley's horns and face.
DIY: Wear a turquoise blue sweatshirt and sweatpants, and fabric-glue purple felt circles onto them.
Boo's Pink T-Shirt Dress
An oversized, light pink crewneck t-shirt or t-shirt dress that hangs loosely.
DIY: Buy a plain men's 2XL light pink t-shirt.
Purple Leggings
Form-fitting dark purple leggings or tights to wear under Boo's pink shirt.
DIY: Use dark purple sweatpants or footless tights.
White Sneakers
Simple, clean white canvas sneakers or slip-on shoes for Boo's footwear.
DIY: Any plain white athletic shoes you already own.
Pink Ball Hair Ties
Two classic hair elastics featuring large pink plastic balls to secure Boo's signature pigtails.
DIY: Wrap pink yarn or pink ribbons around standard hair ties.
Rather not assemble it? See ready-made Sulley and Boo costumes at Spirit Halloween ↗
How to put it together
- 1
For Sulley: Put on the turquoise and purple spotted onesie and zip it up completely.
- 2
Pull the hood up to display Sulley's horns and friendly monster face.
- 3
For Boo: Put on the dark purple leggings and layer the oversized light pink t-shirt dress over them.
- 4
Part Boo's hair down the middle and tie it into two high pigtails using the pink ball hair ties.
- 5
Put on the white canvas 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, slightly messy pigtails secured with pink ball hair ties, keeping bangs straight across the forehead if possible.
Sulley and Boo for couples, groups, kids & more
- couples
- One partner wears the plush Sulley onesie while the other dresses in Boo's pink shirt and purple leggings.
- group
- Add Mike Wazowski wearing a green shirt with a giant single eye, or Celia Mae with snake hair.
- kids
- A toddler wears the pink shirt and pigtails, while an adult wears the Sulley costume for a perfect parent-child look.
- Plus size
- Onesies offer a loose, comfortable fit; Boo's oversized pink tee can be easily sized up for a relaxed drape.
- pet
- Dress a small dog in a green Mike Wazowski knit sweater to accompany the duo.
Tips
- Onesies can get warm indoors, so wear lightweight shorts and a t-shirt underneath.
- For outdoor trick-or-treating, Boo's oversized shirt easily layers over warm thermal shirts.
- Carry a small plush Mike Wazowski toy as a fun prop that doubles as a photo accessory.
- Keep Boo's pigtails high and forward-facing so they are highly visible in photos.
Sulley and Boo costume FAQ
- What does Boo wear in Monsters, Inc.?
- Boo wears an oversized light pink t-shirt, dark purple leggings, white sneakers, and her hair in two high pigtails secured with pink ball hair ties.
- How do you make a DIY Sulley costume?
- You can use a solid turquoise blue sweatshirt and sweatpants, then cut circles out of purple felt or fabric and glue or sew them onto the outfit.
- Is this costume good for cold weather?
- Yes, the Sulley onesie is typically made of warm fleece, and Boo's leggings and oversized shirt make it easy to layer thermals underneath.
Did you know? In Monsters, Inc., Boo's real name is actually Mary, named after her voice actress Mary Gibbs, which is briefly shown on one of her drawings in her bedroom.