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Size Chart Adult Onesies
Have a good look at the size chart below to determine the right size for you.PLEASE NOTE: OppoSuits have a slim-fit design. When in doubt between two sizes, we recommend you to pick the larger size of the two.
HOW TO MEASURE
Grab a tape measure, write down the measurements and compare with our size chart for the right size.
Hold the tape horizontally to measure:
Hold the tape vertically to measure
Bring fun, nostalgia, and maximum comfort together with the iconic Cookie Monster onesie. Inspired by everyone’s favorite cookie-loving monster, this onesie is perfect for fans who want to stand out while staying cozy. Whether you’re lounging at home, heading to a costume party, or gearing up for a themed event, this Cookie Monster onesie delivers instant smiles and all-day comfort.
This Cookie Monster onesie features the unmistakable bright blue color, playful details, and a character hood that brings the look to life. Bold, fun, and instantly recognizable, it’s ideal for costume parties, cosplay, festivals, or relaxed weekends at home. If you love comfort with a sense of humor, this onesie is made for you.
Made from soft, high-quality fabric, the Cookie Monster onesie is warm, breathable, and incredibly comfortable. The relaxed fit allows easy movement, while the front zipper makes it quick to put on and take off. Perfect for lounging, sleeping, or grabbing snacks (cookies encouraged).
• Ideal for lounging and cozy nights in
• Great for costume parties and cosplay
• Perfect for themed events and festivals
• A fun and comfortable gift idea
• Iconic Cookie Monster-inspired design
• Soft, cozy, and comfortable material
• Easy zip closure
• Perfect mix of humor, comfort, and style
Whether you’re relaxing on the couch or stealing the spotlight at a party, the Cookie Monster onesie is guaranteed to bring fun, comfort, and cookie-level happiness wherever you go.
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