Main Content
Adult Sonic the Hedgehog Cosplay Union Suit
Recommended Accessories
Sale Price $9.99
Sale Price $0.99
Sale Price $2.99
$7.99
Sale Price $0.99
Small Moments,
Monster Memories
Follow us @funcostumes and tag us with #yesfuncostumes to be featured here.
Product Information
Size Chart
Runs Small
Slightly Small
True To Size
Slightly Large
Runs Large
| Size | Measurement | Standard | Metric |
|---|---|---|---|
| Small | Chest | 46" | 117cm |
| Small | Sleeve Length | 21" | 53cm |
| Small | Torso | 35" | 89cm |
| Small | Inseam | 21" | 53cm |
| Size | Measurement | Standard | Metric |
|---|---|---|---|
| Medium | Chest | 48" | 122cm |
| Medium | Sleeve Length | 21 1/2" | 55cm |
| Medium | Torso | 36" | 91cm |
| Medium | Inseam | 21" | 53cm |
| Size | Measurement | Standard | Metric |
|---|---|---|---|
| Large | Chest | 50" | 127cm |
| Large | Sleeve Length | 21" | 53cm |
| Large | Torso | 37" | 94cm |
| Large | Inseam | 21" | 53cm |
| Size | Measurement | Standard | Metric |
|---|---|---|---|
| X-Large | Chest | 52" | 132cm |
| X-Large | Sleeve Length | 22 1/2" | 57cm |
| X-Large | Torso | 38" | 97cm |
| X-Large | Inseam | 21" | 53cm |
| Size | Measurement | Standard | Metric |
|---|---|---|---|
| 2X-Large | Chest | 54" | 137cm |
| 2X-Large | Sleeve Length | 23" | 58cm |
| 2X-Large | Torso | 39" | 99cm |
| 2X-Large | Inseam | 21" | 53cm |
Features
- 100% polyester
- Fleece union suit has zipper down center front
- Hood has fiber filled quills on the back, embroidered eyes
- Rib knit wrist and ankle cuffs
- Officially licensed
Speed and Comfort
If you are as old as us, you likely remember playing Sonic the Hedgehog as a kid. It was quite the experience. Blowing into that dusty cartridge, putting it into your SEGA, and hearing that iconic introduction was the best. What about the gameplay? Sonic was the fastest dude around back then and probably still holds the record for the speediest video game character. Thank goodness Sonic was so cool—we couldn't take our eyes off him (as hard as it was).
Okay, we could keep gushing over Sonic, but we figure you have other things to do this year. If you love Sonic as much as we do, and are considering speeding around in costume onesie, check out this Adult Sonic the Hedgehog Cosplay Union Suit. It's the best way to show love to the remarkable character, whether you are going to bed or wearing the Sonic union suit at the next cosplay convention.
Product Details
The officially licensed Sonic onesie features the classic blue and tan colors of our favorite high-speed hedgehog. The fleece union suit also has a handy zipper down the center front of the costume for speedy changes. The best part of the costume has to be the hood, with filled quills on the back, and Sonic's embroidered eyes. If you need a Sonic outfit this Halloween (or whenever, really), make sure you pick up this Adult Sonic the Hedgehog Cosplay Union Suit.
Questions & Answers
Q: Should I size up or no?
(1 Answer)
Asked by Weapon X | October 10, 2025
Monster Responds...
For a union suit like this one, we generally recommend sizing up if your measurements fall between two sizes, since the fit is meant to be relaxed rather than snug. Measure your chest at its fullest point and your torso from shoulder to crotch, then compare those numbers to our size chart to find your best match.(AI Generated Answer)
Q: What size is the model wearing? I want to compare to see if a size small would fit me. (1 Answer)
Asked by SL | October 10, 2025
Monster Responds...
We don't have the model's size on file, but the size small has a 46" chest, 35" torso, and 21" inseam, so comparing your own measurements to those numbers is the surest way to tell if it'll work for you.(AI Generated Answer)
Q: How do you measure "torso"?
(1 Answer)
Asked by Alex | November 2, 2024
Monster Responds...
For a union suit, measure your torso from where your shoulder meets your neck down to your crotch. That measurement is what we use in our size chart, which ranges from 35 inches at a Small up to 39 inches at a 2X-Large, so it's a great number to have handy when choosing your size.(AI Generated Answer)
Q: Hi, what size is the model wearing? (1 Answer)
Asked by Anonymous | October 22, 2024
Monster Responds...
The size the model is wearing isn't something we have on record, but our size chart is the best way to find your fit. For reference, the Small has a 46" chest and 35" torso, and sizes go up to 2XL with a 54" chest and 39" torso, so comparing those measurements to yours will point you to the right size.(AI Generated Answer)
Q: How’s it going? I was interested in purchasing this costume. I was just wondering if it is carried in men’s sizes or is it just women’s sizes or is it unisex sizes? I was just curious thank you :)
(1 Answer)
Asked by Shane | October 14, 2024
Monster Responds...
Hello! The Sonic the Hedgehog Adult Cosplay Union Suit is designed to be unisex, meaning the sizing works for both men and women. You can refer to the sizing chart on the product page for the best fit!Q: if i’m 5’6 what size should i choose?
(1 Answer)
Asked by marco | October 3, 2024
Monster Responds...
Your height alone is a great starting point, but the best way to nail the fit on a union suit is to compare your chest and torso measurements to our size chart. The torso on this one runs from 35 inches at a Small up to 39 inches at a 2X-Large, and the chest ranges from 46 to 54 inches across those same sizes. Measure your chest at its fullest point and your torso from the shoulder-neck junction down to your crotch, then match those numbers to the chart to find your size.(AI Generated Answer)
Q: How long is this costume? Can a big kid size 12-16 wear this?
(1 Answer)
Asked by Anonymous | September 29, 2024
Monster Responds...
This is an adult union suit, so the fit comes down to body measurements rather than clothing sizes. For a size 12-16 kid, the key question is their chest and torso measurements. Our Small has a 46" chest and 35" torso, which is likely the closest starting point, but a child in that size range would probably swim in it since these are adult proportions. I'd recommend measuring their chest and torso and comparing to our size chart to see how the numbers line up before ordering.(AI Generated Answer)
Reviews
- Okay costume, warm!By Morgan | November 2, 2025
My daughter wore this and it looked ok. I wish I would have bought a more costume- like costume. But she was definitely the warmest of all of us!Bottom Line Yes, I would recommend this to a friend.Was this review helpful to you? - Great CostumeBy Anonymous | October 23, 2024
Size X-LargeMy teenager loves it. Perfect fit and great quality.Bottom Line Yes, I would recommend this to a friend.Was this review helpful to you? - PerfectBy Meg | October 14, 2023
Height 5'5" | Weight 250 | Size 2X-LargeMany times I cannot find adult costumes of my interests, let alone in big sizes. I love Sonic, I was so excited to find this. I am soo happy with this costume. I was worried it might be tight, but it's made more like a kigurumi with lots of room, and it fits me perfectly. It's super soft, not too heavy that it would make me sweat, no itchy parts, and seems like it's made really well. Doesn't bother any of my sensory issues! I love it so much and I'm so happy with it! I'm so excited to wear it on Halloween and I'll probably wear it as pajamas too because it's so comfy! :DBottom Line Yes, I would recommend this to a friend.Was this review helpful to you?
