Adult Onesie Plus Sizes of 2025
Best Choice1
Seven Times SixDisney Lilo & Stitch Adult Stitch Kigurumi Cosplay Costume Sherpa Union Suit Pajama Outfit (2X/3X) Blue
Main highlights- SUPER SOFT Faux Shearling FLEECE - This Stitch pajama union suit is made of an ultra-soft, fuzzy Faux Shearling fleece fabric that is sure to keep you comfy and warm whether your hanging at the house, a Halloween party or a costume convention
- SIZING - These are listed in adult sizes that can be worn by either men or women.
- LOOSE, BAGGY FIT - Kigurumi style pajama outfits are meant to be loose and baggy for extra comfortable lounging. The wrist and ankle cuffs have a great stretch feel to keep it on and in place exactly how you want it!
- DISNEY KIGURUMI UNION SUIT, GUARANTEED
- DETAILED STITCH FACE DESIGN ON HOOD - Features high-quality embroidered character eyes and nose on the hood as well as 3D felt teeth and puffy ears
9.8Exceptional
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Value for Money2
Forever LazyForever Lazy Heavyweight Adult Onesie - Drift Away Gray - XL
Main highlights- Ultra soft, heavyweight 85% polyester, 15% cotton blend material is anti-pill and machine washable
- Relaxed, unisex fit allows for comfortable lounging in any position
- Perfect for gifting to encourage relaxation and laziness
- Drawstring hood keeps your head warm on chilly nights
- Convenient rear zipper drop seat and deep side pockets for easy access without removing the pajamas
- Added wide One Size fits heights up to 6ft and weights up to 260lbs
9.6Exceptional
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3
Forever LazyForever Lazy Footed Adult Onesie - Duckie - XXL
Main highlights- ZIPPER DETACHABLE FEET AND REAR ZIPPER DROP SEAT - Our onesies feature a hidden zipper tract that allow users to remove or re-attach the feet as desired thus offering the versatility of both a footed and non-footed pajama. This also comes equipped with a concealed, rear zipper drop seat is conveniently located on the back side of the onesie, so you never have to take it off, even to use the restroom.
- SOFT, COMFORTABLE MATERIAL - Our Forever Lazy onesies are made with a high quality, 100% polyester fleece that is ultra soft and anti-pill. Our onesies can be conveniently laundered at home with a washing machine. Simply add the onesie to a load with like colors, wash in cold water, and then tumble dry on a low heat setting or hang dry.
- SIZES FOR EVERYONE - For many of our styles we also offer matching kids one-piece pajamas. Forever Lazy kids onesies start at sizes XS - 4/5 through XL - 14. Outfit the entire family in these cozy Forever Lazy onesie pajamas. Check out our Amazon store for our kids listings.
- RELAXED, UNISEX SIZING - Our sizing does not follow traditional sizing because the onesies are unisex. As a result, it is important that you follow our Forever Lazy size chart in the secondary images. Start with the height column on the size chart, then slide over and make sure your weight is within the size for your height. If not, size up until your weight is found. The size "One Size" is our size Small, but in a wide fit.
- GIVE THE GIFT OF LAZINESS - A comfortable pair of one-piece pajamas is a thoughtful way of telling him or her, "You deserve to relax, and do nothing for a long time" - making for very fun and unique present.
9.5Excellent
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4
Funziez!12% OffFunziez! Sherpa Bear Adult Onesie - Animal Halloween Costume - Plush Teddy One Piece Cosplay Suit for Adults, Women and Men
Main highlights- SIZING & CARE INSTRUCTIONS - We recommend your new onesie costumes be ironed and laid flat. Available in adult sizes X-Small through X-Large. See size chart in image 4 for details. Each order includes one onesie in the size selected above. Please confirm sizing with the size chart provided in image 4.
- FULL OF FUN DETAILS - This adorable and eye - catching sherpa bear onesie features a hood with detailed eyes, ears and smiles for full effect. Match with a pair of animal slippers (not included) for your next pajama party!
- COZY SHERPA CONSTRUCTION - Fully crafted from soft, luxurious sherpa, this fun costume is the perfect blend of comfort and fun. Ideal for staying warm during those chilly winter months!
- COZY - A special blend of comfort and fun, these plush materials are soft to the touch and will keep you warm during those cold winter months. Zip-up closure allows you to quickly get dressed while the loose fit gives you the flexibility to easily wear over your existing clothes or jacket.
- CONVENIENT POCKETS - Slip pockets at the sides are perfect for storing all your stuff with convenience, or just for keeping your hands warm in this one piece pajama set. It's the best place to keep your phone, wallet, keys, gum wrappers, crumpled up receipts and so much more!
9.4Excellent
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5
Funziez!Funziez! Adult Onesie Halloween Costume - Animal and Sea Creature - Plush One Piece Cosplay Suit for Adults, Men and Women
Main highlights- VACUUM SEALED PACKAGING - Your new FUNZIEZ! by Silver Lilly will come in a protective vacuum-sealed package designed to reduce materials, fuel, waste, and our carbon footprint. While caring for the planet and reducing packaging, we can pass cost savings on to you!
- SIZING & CARE INSTRUCTIONS - We recommend your new onesie costumes be ironed and laid flat. Available in adult sizes X-Small through X-Large. See size chart in image 3 for details. Each order includes one onesie in the size selected above. Please confirm sizing with the size chart provided in image 3.
- PERFECT FOR ANY OCCASION - Loose fitting style allows for full freedom of movement while maintaining style and comfort. The fun designs will make sure you get noticed at your next Halloween party, cosplay event, or festival.
- GET YOUR ROAR ON! - These eye-catching triceratops onesies feature a hood with adorable face, horns, and plush tail for full effect. Match with a pair of animal slippers (not included) for your next pajama party!
- COMFY & COZY - A special blend of comfort and fun, these plush materials are soft to the touch and will keep you warm during those cold winter months. The zip up closure allows you to quickly get dressed while the loose fit gives you the flexibility to easily wear over your existing clothes or jacket.
9.3Excellent
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6
MEILISMEILIS Stitch Cosplay Costumes Cartoon Sleepsuit Teens Lounge Wear Unisex Adult Onesie Pajamas (Blue, 3X-Large)
Main highlights- sleeve_type Long Sleeve
- You can dance in the casual / Animation Shows / bedroom / indoor wearing, comfortable fabric, it's so warm Christmas Holiday Pajamas
- Suit For: Unisex for adults, or seniors and teenagers. S fits height from 150CM 160CM(5' 5'3''), M fits height 160CM 168CM(5'3'' 5'6''), L fits height 168CM 178CM(5'6'' 5'10''), XL fits height 178CM 188CM(5'11'' 6'2''), XXL Largefit height from 6'2'' 6'5'',3XL Large fit height from 6'5'' 6'7''
- Multi Use Adult Onesie is Perfect as a Animal Costume on Halloween, Pajamas Costume, Sleeping Wear, Cosplay Costume, Relaxed House Dress
- Material: Soft and Warm Polar Fleece; Machine Washable. Content:1 x Pajamas(no shoes, and others)
- Features: Cute Hoodie, Long Ears, 3D Face Mask, Button Closure
9.1Excellent
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7
Just Love6259-XXL Just Love Adult Onesie / Onesies / Pajamas,Skeleton
Main highlights- TRICK OR TREAT: The black microfleece onesie with white skeleton print is sure to be the hit of your Halloween party. They are also great for cosplay or kigurumi.
- FITS TRUE TO SIZE: We stock these scary non footed full body pjs in adult sizes ranging from XS-XXL, with the right fit giving you enough room for comfortable movement.
- EASY TO CLEAN: Simply toss the one piece pajamas into the washing machine for a hassle-free clean without risk of shrinking or losing color.
- DESIGNED FOR DURABILITY: All the seams in this hooded onesie are lock stitched for extra strength and provide enough allowance to prevent any tearing.
- COMFORTABLY WARM AND SNUG: These adult onesie pajamas are made using ultra-soft synthetic material that feels incredibly cozy and keeps you warm during those cold nights.
8.9Very Good
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8
Funziez!40% OffFunziez! Dinosaur Costume - Trex Cosplay - Reptile One Piece Pajama (Green Dinosaur, L)
Main highlights- VERSATILE - Loose fitting materials allow you the flexibility of movement while maintaining style and comfort. The fun and whimsical designs will make sure you get noticed at your next furry convention or party. Carry your remote or keys around with you thanks to two front pockets.
- VACUUM SEALED PACKAGING - Your new Funziez! by Silver Lilly will come in a protective vacuum sealed package designed to reduce materials, fuel, waste and our carbon footprint. While caring for the planet and reducing packaging, we are able to pass cost savings on to you!
- SIZING & CARE INSTRUCTIONS - We recommend your new onesie costumes be ironed and laid flat. Available in adult sizes X-Small through X-Large. See size chart in image 3 for details. Each order includes one onesie in the size selected above. Please confirm sizing with the size chart provided in image 3.
- DETAILS - The adorable and comfy animal onesie designs all feature a hood with eyes, teeth, and nose for full effect. Matching tails and chest designs help complete your ultimate cosplay look! Match with a pair of animal slippers (not included) for your next pajama party.
- COZY - A special blend of comfort and fun, these plush materials are soft to the touch and will keep you warm during those cold winter months. The button up closure allows you to quickly get dressed while the loose fit gives you the flexibility to easily wear over your existing clothes or jacket.
8.8Very Good
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9
WishlikerWishliker Adult Onesie Animal Pajamas Halloween Cosplay Costumes Party Wear Blue S
Main highlights- The Animal Stitch Onesie is comfortable and suitable for both men and women, can be worn at home, staying in the couch and enjoying leisure with the family.
- Soft and comfortable. It keeps warm in autumn and winter and a better choice for carnival costume.
- Please check the size chart before ordering the item !!!
- Occasion: Halloween, Christmas, Children’s Party, Carnival, Costume, Birthday Game.
- Many animal style, very friendly, The animal suit has a sweet face, makes your dreams become reality costume!
8.7Very Good
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10
YUTCOTCYUTCOTC Mothman Costume Mothman Onesie Pajamas Halloween Cosplay Unisex Party Costume
Main highlights- [Size And Packaging]: Size Small fits for height 4'6"-5'2"(140-159cm);Size Medium fits for height 5'2"-5'5"(160-169cm);Size Large fits for height 5'6"-5'8"(170-179cm);Size X-Large fits for height 5'9"-6'2"(180-189cm);Please choose your right size carefully.See size chart for details. In order to avoid damage to the product, we ship it in vacuum packaging to ensure that the product you purchased is in good condition
- [Perfect service]: Thank you for purchasing our products. Your satisfaction is the direction of our efforts. If you have any questions, please ask us in time, and we will give you a satisfactory answer as soon as possible.
- [Perfect Gift]:This Mothman pajama is your best choice for Halloween, Christmas, Thanksgiving, festival, show, little cosplay, fancy dress, cartoon pajama party, dress up, home wear, holiday, cosplay costume, home leisure. Give your loved ones the Mothman pajamas as a gift and they'll be pleasantly surprised,Mothman zipper onesie pajamas into the washing machine for a hassle-free clean.
- [Material]: 100% polar fleece pajamas, breathable, warm and comfortable, soft to the touch. Let this Mothman pajamas warm you like never before on those cold days.The zipper closes for a quick fit, while the loose fit gives you the flexibility to easily slip over your existing clothes or jacket.There are two handy pockets on the side to store your phone or keys.
- [DETAILS]:Vivid Mothman characters, Red eyes, erect ears and scary wings complete your scary Mothman costume and bring you an extraordinary experience.Perfect for everything from lounging around at home to bar and music festivals!You're sure to stand out at Halloween and your usual party.
8.5Good
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