Designer's Guide to Blank Onesies


Posted by AllDayShirts on to Product Guides

In 2020, there were an estimated 3.6 million babies born in the United States alone. That's a lot of new little bundles of joy!

Today, baby onesies not only offer comfort and convenience, but also the ability for personalization. Blank onesies are ideal for customizing and adding personality to your newborn baby's wardrobe. 

Incorporating clever ideas for twins such as blank baby onesies with the phrase "Former Wombmates" on them will make everyone who sees them smile. And custom printed blank onesies are a unique and memorable gift for the new mom in your life.

Do you want to know more about printing on blank onesies? In this guide, we'll explain all you need to know about blank onesies and give you some examples of the best blank baby onesies to use for printing custom designs. Keep reading for more information. 

What Are Baby Onesies?

Baby onesies, as they are known in the United States, are a versatile piece of clothing for infants. A man named William Artzt developed a one-piece bodysuit for infants in the 1950s. This revolutionary design allowed for the baby to wear a loose covering over their body that still made for easier diaper changes.

The baby onesies utilized snaps around the bottom and shoulders of the outfit. All a parent had to do was unsnap this bodysuit to change the diaper and then snap it back in place when they were done. Plain white blank onesies may have once been used as a form of undergarment under a baby's clothing for extra warmth and protection in colder temperatures.

In 1982, the Gerber baby food company purchased the term "onesie" and it became a registered trademark and exclusive entity of their line of childrenswear. In this sense, Onesies® may only apply to their line of undergarments and bodysuits. It is still a favored descriptor by the general public for any generic one-piece baby garment.

The more modern onesie of today is built to be worn underneath or as a standalone bodysuit. Onesies come in a variety of colors and patterns. They are lightweight and comfortable for babies to wear, especially in warmer summer months.

Onesie Sizing

The most common sizes for baby onesies vary from newborn to toddler size. Most onesies are sized according to the average size a baby should be at certain age milestones. This is not always 100% accurate and sizes can vary from brand to brand.

  • Preemie (for smaller infants delivered before their projected due date)
  • 0-3 months
  • 3-6 months
  • 6-9 months
  • 9-12 months
  • 12-18 months
  • 18-24 months
  • 2 years

Some babies who are born larger may not fit into the size that corresponds to their age. In this case, it is necessary to pick out a larger size. Likewise, a premature baby will not fit into its milestone age range and may need special sizing considerations. 

A comfortable baby onesie should not be too saggy nor should it fit too tightly around the arms and legs. You want some freedom of movement without cutting off the circulation. 

Best Blank Onesies

G64ZEE-Gildan Softstyle® Infant One-piece

Gildan Softstyle Onesie

Feel the delicate softness of this Gildan Softstyle® Infant One-piece. Made from 5.5oz 100% ring-spun cotton, this bodysuit comes in 5 beautiful colors. Its sizes start with 0-3 months and go all the way up to size 18-24 months. 

This line of blank baby onesies has a high stitch density and a surface that takes printing especially well. This makes them one of the most ideal blank onesies that are perfect for designing. 

134B-Bella Canvas Infant Tri-Blend Short-Sleeve Onesie

134B Bella Canvas Onesie

The Infant Tri-Blend Short-Sleeve One-Piece from Bella Canvas comes with a three-snap design at the crotch for easy putting on and removal. It has a soft tri-blend construction made from a blend of 50% polyester, 25% cotton, and 25% rayon.

These Bella Canvas blank onesies are 40 singles of lightweight and comfortable fabric that are available in 6 heathered colors. Peach, Blue, Charcoal Black, Ice Blue, Olive, and Mauve. They come in sizes 3-6 months, 6-12 months, 12-18 months, and 18-24 months.

100B-Bella Canvas Infant Jersey Short-Sleeve One-Piece

100B Bella Canvas Onesie

Another variation is the Infant Jersey Short-Sleeve One-Piece from Bella Canvas. It comes in 12 colors including Pink, True Royal, Heather Columbia Blue, and Yellow.

Comprised of 32 singles, these 4.2oz blank baby onesies are made from 100% combed and ring-spun cotton fabric for superior softness. It is available in sizes 3-6 months, 6-12 months, 12-18 months, and 18-24 months.

4400-Rabbit Skins Infant Baby Rib Onesie

4400 Rabbit Skins Onesie

The Infant Baby Rib Bodysuit from Rabbit Skins contains a 3 snap enclosure at the crotch that is covered by snap tape for extra comfort and protection. 

These blank onesies are made from 5.0oz 100% combed ringspun cotton and featured a 1x1 baby rib design. With 31 vibrant colors to choose from, you are certain to find a color you and your little one will adore. From Hot Pink to Turquoise and nearly everything in between.

All of the CVC colors are 60% combed and ring-spun cotton with 40% polyester. The heather colors are a combination of 88% combed and ring-spun cotton and 12% polyester. The white blank onesies are sewn with 100% cotton thread. 

This particular line of blank baby onesies is suitable for Direct-to-Garment printing, screen printing, and Heat Transfer Vinyl. They come in sizes for Newborn, 6 months, 12 months, 18 months, and 24 months. 

4424-Rabbit Skins Infant Fine Jersey Bodysuit

4424 Rabbit Skins Onesie

Lastly, the Infant Fine Jersey Bodysuit from Rabbit Skins also has a 3 snap crotch enclosure. It comes in 22 color options and in sizes from Newborn to 6 months, 12 months, 18 months, and 24 months. 

These blank onesies are made from 100% combed and ring-spun cotton. The heather colors are a 93% cotton and 7% polyester combination.

It features double-needle ribbed binding on the hem, sleeves, neck, shoulders, and leg openings. Along with flatlock seams and a topstitched ribbed collar, and has a CPSIA compliant- tracking label in the sideseam.

Quality Wholesale Blank Onesies for Custom Printing

Whether you are printing on blank onesies for personal use, making them as gifts for friends and family, selling your custom creations online, or designing and creating your own custom merchandise for charity events, has you covered. offers a complete line of blank wholesale onesies for your custom printing needs. No matter what you use them for, you can buy one or buy blank onesies in bulk. Browse our full product catalog on our website today.

Place your order on and check out this recent blog post about the Best T-Shirts for HTV Printing while you are there.

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