• Man and Woman wearing blue pluche Cookie Monster Adult onesie for adults. Standing next to each other, holding hood with hands.
  • Man and Woman wearing blue pluche Cookie Monster Adult onesie for adults. Standing next to each other, holding hood with one hand.
  • Man wearing blue pluche Cookie Monster onesie
  • Women wearing blue pluche Cookie Monster Adult onesie for women
  • Man wearing blue pluche Cookie Monster onesie
  • Women wearing red pluche Cookie Monster Adult onesie for women
  • Man wearing blue pluche Cookie Monster onesie, view from the back
  • Women wearing red pluche Cookie Monster Adult onesie for women, view from the back
(46 reviews)

Cookie Monster
Adult Onesie


Color: Cookie Monster

Regular price $54.99
$54.99
Sale price
Regular price
Sale Sold out

Size: XS


Features licensed Onesies:

  • Easy to wash and iron
  • Soft and comfortable to wear
  • Brushed fleece for extra softness
  • Officially Licensed

  • Fabric: 100% polyester
  • Washing instructions: Do not tumble dry, Machine Washable, Do not bleach

  • Includes: Onesie
  • Onesie: Hood, Side pockets, Kangaroo pocket at front, Brushed fleece inside

  • Model Size: The male model is 6'1.5" / 186 cm tall and is wearing size M, the female model is 5'8" / 173cm and is wearing Size S

Adults get stuck picking from the sad rack of last-minute Halloween costumes while kids get all the good characters.

What This Is

This is an officially licensed Cookie Monster onesie, a blue hooded jumpsuit with brushed fleece interior, side pockets, and a front zipper, built as a comfortable Cookie Monster Halloween costume for adults instead of a flimsy last-minute option.

Why This Cookie Monster Onesie Works

  • Officially licensed Sesame Street design, so the blue coloring and character hood actually match Cookie Monster instead of a generic blue costume.
  • Full adult sizing from XS to 2XL, though it runs small, so this Cookie Monster Halloween costume actually fits instead of stretching over a kids cut.
  • Brushed fleece interior keeps this Cookie Monster onesie warm for a whole night out, not just a quick photo.
  • Front zipper and side pockets mean fast on and off, plus somewhere to keep your phone or keys.

Good For

  • Halloween parties and trick-or-treating
  • Costume parties and Sesame Street fan events
  • Movie nights and cozy loungewear at home
  • Matching group costumes with an Elmo onesie

Specifications

Included Onesie
Material 100% polyester with brushed fleece interior
Design / License Officially licensed Sesame Street Cookie Monster design
Fit Unisex relaxed fit, runs small, size up if you're unsure
Available sizes XS, S, M, L, XL, 2XL
Care Machine washable, do not tumble dry, do not bleach

Frequently Asked Questions

Is this Cookie Monster onesie machine washable?

Yes, it's machine washable. Just don't tumble dry or bleach it, so the blue color stays bright.

Is this an officially licensed Cookie Monster Halloween costume?

Yes, this is an officially licensed Sesame Street product, not a generic blue costume with an add-on face.

Should I size up for this onesie?

Yes, this onesie runs small, so if you're between sizes it's best to size up.

Does this include any accessories?

No, this includes the onesie itself only, no gloves or shoes.

Is there a matching Elmo costume or a kids version?

Yes. For a matching group costume, there's the Elmo Onesie for adults, and for kids there's the Cookie Monster Kids Onesie and the Elmo Kids Onesie.


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Quality and Fit

Look sharp, feel comfy. Our slim-fit suits are made from high-quality polyester twill—built for style and movement. Go classic or go wild—your wardrobe, your rules.

Overall rating: 4.652174 / 5 from 46 reviews.

AI Generated Review Summary

The Cookie Monster onesie offers a perfect blend of fun, comfort, and style. Made from soft, high-quality fabric, it provides all-day coziness and is ideal for lounging, costume parties, and themed events. Its iconic design and easy zip closure make it a favorite among fans.

Summary topics

  • Product Quality (41%): Many customers brought up the great quality of the product, mentioning it multiple times in their reviews.
  • Costume Quality (19%): A significant number of customers brought up that the costume is great and of amazing quality.

Review topics: ["size","fit","fabric","costumes","material","quality","delivery","onesie","suit","order","service"].

Review highlights

  • "It’s super cozy and warm and great quality!"Kaitlin W.
  • "Shadows costume was amazing quality."Cristina M.
  • "Nice fit, and a fantastic soft fabric"Frans B.

Reviews

Perfect material, Perfect fit, very

"Perfect material, Perfect fit, very fast shipping, I can recomended 🤗"

Vít C. (4/5)

"its so cool"

Savannah (5/5)

"Fits great and very comfortable!"

Inferno (5/5)

Passt super und ist gut

"Passt super und ist gut verarbeitet. Schnelle Lieferung"

Andrea P. (5/5)

Tolles Kostüm

"Hatte den Overall als Kostüm für meinen Mann gekauft. Super Stoff und bequem. Nummer größer bestellt, damit noch Thermo-Sachen darunter getragen werden können."

Diana P. (5/5)

Schöner Überzeugung.

"Schöner Überzeugung."

Thomas W. (5/5)

Great quality, just as depicted

"Looks and feels great, only minor complaints are that it’s very warm (unsurprisingly) and that it’s very awkward to use the restroom in."

Brienne P. (4/5)

Top quality, fast delivery.

"Top quality, fast delivery."

Pierpaolo V. (5/5)

More than I hoped for

"The suits I ordered look great and are super comfortable. They are as advertised and that is a huge deal for me, since hardly anything is these days."

Jacquelynne G. (5/5)

Looks great, good quality

"Hard to go to bathroom while wearing if you have a vulva."

Brienne P. (4/5)

Q&A