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Infant Stay Puft Onesie Costume

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Made By Us Exclusive
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Item # FUN1390IN
Items Included
  • Onesie
  • Pair of Booties
Recommended Accessories

Small Moments,
Monster Memories

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Product Information

Size Chart
Runs Small
Slightly Small
True To Size
Slightly Large
Runs Large
Size Measurement Standard Metric
0/3 Months Chest 21 3/4" 55cm
0/3 Months Sleeve Length 10" 25cm
0/3 Months Torso 13" 33cm
0/3 Months Inseam 6" 15cm
0/3 Months Face Opening 20" 51cm
Size Measurement Standard Metric
3/6 Months Chest 22 1/2" 57cm
3/6 Months Sleeve Length 10 1/2" 27cm
3/6 Months Torso 14" 36cm
3/6 Months Inseam 6 1/2" 17cm
3/6 Months Face Opening 20" 51cm
Size Measurement Standard Metric
6/9 Months Chest 23" 58cm
6/9 Months Sleeve Length 11 1/2" 29cm
6/9 Months Torso 15" 38cm
6/9 Months Inseam 7" 18cm
6/9 Months Face Opening 20" 51cm
Size Measurement Standard Metric
9/12 Months Chest 24" 61cm
9/12 Months Sleeve Length 12 1/4" 31cm
9/12 Months Torso 16" 41cm
9/12 Months Inseam 8" 20cm
9/12 Months Face Opening 20" 51cm
Size Measurement Standard Metric
12/18 Months Chest 24 1/2" 62cm
12/18 Months Sleeve Length 13" 33cm
12/18 Months Torso 17" 43cm
12/18 Months Inseam 9 1/2" 24cm
12/18 Months Face Opening 20" 51cm
  • Fiber content coming soon
  • Jumpsuit has front zipper from neck down right leg
  • Rib knit wrist and ankle cuffs
  • Fleece jumpsuit is fully lined
  • Fiberfill stuffing between lining and outer shell for plump look
  • Velvet sailor collar has ribbon trim
  • 2 parts of necktie are attached under front of collar
  • Sailor hat attached to top of hood
  • Officially licensed
  • Exclusively made by us

Get Your Little Marshmallow Ready for Halloween!

Are you ready to see your little one transform into the cutest, most delicious marshmallow ever? With the Stay Puft Onesie Infant Costume, your baby will be the sweetest treat on the block this Halloween!

Plump and Plush Design

This officially licensed, exclusive costume is made from 100% polyester, ensuring comfort and durability for your little marshmallow. The jumpsuit features a front zipper that goes from the neck down to the right leg, making it easy to dress up your little one. The rib knit wrist and ankle cuffs keep the costume in place, while the fully lined fleece jumpsuit provides extra warmth and coziness. With fiberfill stuffing between the lining and outer shell, your baby will have a plump and adorable look that will melt hearts!

Cute and Detailed Accents

The Stay Puft Onesie Infant Costume comes with a velvet sailor collar adorned with ribbon trim, adding a touch of elegance to the outfit. The two parts of the necktie are attached under the front of the collar, completing the adorable sailor look. And let's not forget about the sailor hat attached to the top of the hood, making your little one the cutest sailor marshmallow in town!

Perfect for Halloween Fun

Whether you're taking your baby out for their first trick-or-treating adventure or attending a Halloween party, this Stay Puft Onesie Infant Costume is the perfect choice. It's not only comfortable and easy to wear, but it's also an absolute showstopper. Get ready for the oohs and aahs as your little marshmallow spreads joy and sweetness wherever they go!

Don't miss out on this adorable and officially licensed costume. Get your Stay Puft Onesie Infant Costume today and make this Halloween a truly memorable one for your little marshmallow!

Made By Us
Designer Halloween costumes

We believe that costumes have the power to create some of life's best moments. That's why we started Made by Us. This diverse selection of costumes and accessories are all artfully designed and expertly crafted by our talented team of artists, designers, and developers.

Costume experts designing Halloween costumes

Each project begins with a passion for true quality–embroidered patches, faux fur cut with care, and hand-selected fabrics that are as durable as they are comfortable. Those are just a few examples of how much craft and creativity we put into each and every product. Just for you.

Behind the scenes of exclusive Halloween costume design

No matter how much time it takes, our goal has always remained the same–to create products that inspire your life's best moments–the big, the small, the funny, the spooky, and the sweet. The moments we all cherish. That's Made by Us.

Questions & Answers

Q: How do I wash this before putting it on my child? I’m nervous the “puff” will go away in the washing machine. (1 Answer)
Asked by Kristen | October 29, 2023
Monster Responds...
As costumes are not made like regular clothes, they are more delicate. Most of the time there's a tag with care instructions, otherwise, we recommend hand washing or spot cleaning and hanging it to dry. Please do not iron, instead, you would want to steam out wrinkles.


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