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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
Disappear into pure comfort with the bold and cozy Shadow onesie. Designed for those who like a clean, powerful look with maximum comfort, this onesie is perfect for lounging, chilling, or standing out in a subtle yet confident way. Whether you’re relaxing at home or heading to a casual costume party, the Shadow onesie delivers effortless style and all-day comfort.
The Shadow onesie features a sleek, dark design that’s versatile, timeless, and easy to wear. No loud prints, just a strong, mysterious look that speaks for itself. It’s the ideal choice for anyone who wants a comfortable onesie that still feels grown-up and stylish.
Made from soft, high-quality fabric, the Shadow onesie feels warm, breathable, and incredibly comfortable. The relaxed fit allows easy movement, while the front zipper makes it quick and easy to put on or take off. Perfect for long evenings on the couch, lazy weekends, or cozy nights in.
• Ideal for lounging and relaxing at home
• Great for casual parties or themed events
• Comfortable enough for sleeping
• A perfect gift for comfort lovers
• Clean, minimalist design
• Soft, cozy, and comfortable material
• Easy zip closure
• Perfect balance of style and comfort
If you’re looking for comfort without distractions, the Shadow onesie is your go-to choice. Simple, stylish, and incredibly comfortable; this is loungewear done right.
You are currently shipping to United States and your order will be billed in USD $.