What does Boo wear in Monsters, Inc.?

Boo wears an oversized light pink crewneck t-shirt as a nightshirt, light purple/lavender leggings, white ankle socks, and her hair in two high pigtails secured with pink bubble hair ties.

How do you style Boo's hair if you don't have bangs?

You can create faux bangs by sectioning off a front piece of hair, sweeping it across your forehead, and pinning it to the side, or simply wear the pigtails without bangs.

What props should I carry for a Boo costume?

The best prop is a plush toy of Mike Wazowski (whom she calls 'Mike Wazowski!') or a big blue fuzzy Sulley plush.

AI-generated example

Boo Costume

Bring Pixar's most adorable toddler to life with this simple, comfy look.

Boo from Monsters, Inc. is one of Pixar's most beloved characters, making her a go-to choice for a cute, comfortable, and highly recognizable costume. Her signature outfit consists of an oversized pink t-shirt worn as a nightshirt, lavender leggings, and high pigtails. It is an incredibly easy DIY look that works perfectly for kids, adults, and group themes.

Difficulty: Easy
Time: ~15 min
Budget: $15–40

See yourself as Boo →What you need Buy the Boo costume

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See yourself as Boo

One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.

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One render, $1. No account needed — if it fails you're not charged. Pricing.

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Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.

Boo costume — Example look · AI-generated

You as Boo

Result

What you need for a Boo costume

Short on time? Buy it ready-made

Spirit Halloween sells the complete Boo costume — one box instead of 5 pieces.

Shop Boo at Spirit ↗

Oversized pink t-shirt
A plain, light pink crewneck t-shirt, sized up several times to fit like a loose nightshirt.
DIY: Use a plain pink t-shirt from your closet that is a few sizes too big.
Amazon
Lavender leggings
Light purple or lavender slim-fit leggings to wear underneath the oversized shirt.
DIY: Any light purple leggings or tights will work.
Amazon
White ankle socks
Simple, clean white fold-over ankle socks.
DIY: Standard white athletic socks folded down.
Amazon
Pink bubble hair ties
Classic retro hair elastics featuring two pink plastic balls on each tie.
DIY: Wrap regular pink hair ties around your pigtails and attach pink pom-poms or beads.
Amazon
Little Mike Wazowski plush
A small plush toy of the one-eyed green monster, Mike, to carry as a prop.
DIY: Carry any green monster toy or print out a picture of Mike to tape to a cardboard backing.
Amazon

Rather not assemble it? See ready-made Boo costumes at Spirit Halloween ↗

How to put it together

1
Put on the light purple or lavender leggings first.
2
Slip on the oversized pink crewneck t-shirt so it hangs loosely over the leggings like a nightshirt.
3
Put on the white ankle socks, folding them down slightly at the ankles.
4
Part your hair down the middle and tie it into two high, symmetrical pigtails.
5
Secure each pigtail with a pink bubble hair tie, ensuring the pink balls are visible at the base of the pigtails.
6
Hold your Mike Wazowski plush toy to complete the adorable Pixar look.

Makeup & hair

Style your hair into two high pigtails with straight-across bangs framing your face. Keep makeup minimal and natural, perhaps adding a touch of pink blush to the cheeks for a youthful, wide-eyed look.

Boo for couples, groups, kids & more

couples: Pair up with someone dressed as Sulley in a blue spotted fuzzy jumpsuit or Mike Wazowski in a green shirt.
group: Form a Monsters, Inc. trio with Mike Wazowski and Sulley, or add Celia Mae and Randall for a larger group.
kids: This is an incredibly popular and comfortable costume for toddlers; use a soft cotton pink nightshirt and cozy leggings.
Plus size: Choose an ultra-soft, extra-large pink tunic or t-shirt dress for a comfortable, flowy fit.
pet: Dress your dog in a small green one-eyed monster shirt to play the role of Mike Wazowski.

Tips

Since the t-shirt is oversized, choose a soft, breathable cotton fabric to stay comfortable all night.
If trick-or-treating in cold weather, layer a long-sleeve pink shirt underneath the t-shirt.
For photos, hold the Mike plush close to your chest and give a wide, cheerful smile.
If you don't have bangs, you can sweep a few front strands of hair forward or use clip-in bangs.

Boo costume FAQ

What does Boo wear in Monsters, Inc.?: Boo wears an oversized light pink crewneck t-shirt as a nightshirt, light purple/lavender leggings, white ankle socks, and her hair in two high pigtails secured with pink bubble hair ties.
How do you style Boo's hair if you don't have bangs?: You can create faux bangs by sectioning off a front piece of hair, sweeping it across your forehead, and pinning it to the side, or simply wear the pigtails without bangs.
What props should I carry for a Boo costume?: The best prop is a plush toy of Mike Wazowski (whom she calls 'Mike Wazowski!') or a big blue fuzzy Sulley plush.

Did you know? Boo's real name in the movie is Mary, named after her voice actress Mary Gibbs, which can be seen written in crayon on one of the drawings in her bedroom.