Cookie Monster Onesie

£44.99

  • Fabric: thick bright blue fleece
  • Style: hood with two white googly eyes, hip pocket embroidered COOKIE MONSTER with a plush chocolate chip cookie
  • Comfort: button front, roomy cut, ribbed cuffs at wrists and ankles
  • Perfect for: Halloween parties, group costumes, brunch in pyjamas, Sesame Street fans
  • Machine wash: safe, easy care
  • Ultra-soft fabric | Warm and comfortable
  • Pyjamas and costume | Two in one
  • Any occasion | Bedtime, parties, film nights
  • Gift-ready | One they’ll actually wear
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Size Chart

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Cookie Monster Onesie

Cookie Monster Onesie

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  • Fabric: thick bright blue fleece
  • Style: hood with two white googly eyes, hip pocket embroidered COOKIE MONSTER with a plush chocolate chip cookie
  • Comfort: button front, roomy cut, ribbed cuffs at wrists and ankles
  • Perfect for: Halloween parties, group costumes, brunch in pyjamas, Sesame Street fans
  • Machine wash: safe, easy care

Raid the cookie jar in a Women’s Cookie Monster Onesie

There is a certain freedom in being a blue monster whose only goal is dessert. This Cookie Monster onesie for adults captures it in thick blue fleece, with two white googly eyes perched on the hood and a chest that closes with a neat row of buttons. The signature pocket on the hip spells out the monster’s name in embroidery and comes with a plush chocolate chip cookie tucked inside, so the snack is never far. Ribbed cuffs at the wrists and ankles keep the warmth locked in through the whole night.

Men’s Cookie Monster Onesie for grown-ups who never left Sesame Street

Some childhood heroes deserve an adult-sized comeback. The adult Cookie Monster onesie turns nostalgia into the comfiest pyjamas and the boldest outfit at the Halloween party, the Christmas jumper night or the Sunday brunch nobody wants to get dressed for. The roomy cut leaves space for a real appetite, the fleece feels soft from the first evening, and the buttons open fast when the oven timer rings. Om nom nom has never looked this relaxed. Add it to the basket and let the cookie crumbs fall where they may.

The street keeps growing

For a family photo in matching outfits, the kids Cookie Monster onesie brings this look in a smaller size. The Elmo onesie is the ideal match for a costume duo. Finally, the adult onesies collection covers every other design for grown-ups.

Frequently Asked Questions

They’re made to keep you warm on the sofa through autumn and winter, so yes, they’re cosy. The relaxed fit lets air move around, though, so you won’t get that stuffy feeling you get from tight pyjamas.
Machine wash at 30°C on a gentle cycle. Turn them inside out and pop them in a mesh laundry bag to protect the hood. Skip the tumble dryer and the iron. They air-dry quickly and fluff right back up on their own.
Yes, every onesie we sell is unisex. The roomy cut works for men and women alike, our kids’ styles fit girls and boys just the same, and our baby sizes are cut the same way for everyone. Just check the size chart to find your fit.
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Adult size chart (measurements in cm)

SIZEHEIGHTCHESTSHOULDER WIDTHSLEEVE LENGTHONESIE LENGTH (EXCLUDING HOOD)
S144 - 1531164650127 - 130
M154 - 1631204853137 - 140
L164 - 1731245056147 - 150
XL174 - 1831285259157 - 160