When Do Babies Stop Wearing Onesies?

Parents love to use onesies for their babies for a lot of practical reasons. Over the last few years, they have grown popular as a staple in the newborn nursery. There isn’t necessarily a single, right answer to when your baby should stop wearing onesies. The first onesies, or one-piece suits were made for adults. It was not until after WWII that the baby onesie was created. There are many factors to consider to help you decide how long your baby can continue wearing the popular onesie.

side zip footless onesie

What is a Onesie?

The first onesie for babies was designed by Gerber over 40 years ago. They have evolved over the decades. In essence, it’s a one-piece clothing item designed to be comfortable for babies, makes diaper changing easier, and fastens securely. Newborn onesies from Little Biscuit Clothing include footies to keep baby’s feet covered as they start moving more. Smaller onesie sizes include fold-over mittens to keep your baby from accidentally scratching their faces. Onesies from Little Biscuits are made of bamboo fabrication which is breathable, durable, anti-bacterial, anti-fungal, hypoallergenic, and natural.  

Reasons Babies Wear Onesies

Once parents discover the onesie, there is no turning back! There are a lot of reasons that the onesie is so popular, here are just a few of them.

Comfortable and Cozy

Onesies are practical and that makes them a great choice for babies. They fasten securely and provide a great cozy under-layer in cooler climates. Bamboo onesies are gentle on baby’s delicate skin and offer the ultimate in versatility. A full body onesie that includes long sleeves are great for cold weather wear.

Convenient for Parents

Onesies are a great choice for parents and babies. They come in a variety of colors and can be worn as a complete outfit. They fit nicely in changing bags, and they don’t work their way up when your baby starts wriggling around.


Onesies fasten in a way that makes diaper changes quick and easy. They are also helpful for holding the diaper in place. They do not fit too tightly, so that your baby or toddler stays comfortable while wearing them.


Parents of newborns may be concerned about baby clothes that irritate the umbilical cord stump. Any clothing can irritate the area, and you’ll want to be cautious until the stump has fallen off. The onesie fastens securely, so they won’t ride up over your baby’s head like some clothing items. This prevents a onesie from becoming a potential suffocation risk.

When Should a Baby Transition from Onesies?

There isn’t one specific time to say that it is when a baby should stop wearing onesies. Parents are usually aware when the transition is needed. Here are a few factors to consider as your baby continues to grow.

Toilet Training

Once your baby is ready to start toilet training, onesies can get in the way or get wet. Toddlers may also have trouble snapping or unsnapping the fasteners. Most babies don’t start potty training until they are closer to 2 years of age, tops and bottoms can help them manage themselves a little better. However, onesies are still great options for sleepwear even during potty training.


Most onesies go up to 24-month sizes. Finding them for toddlers who are 3 or 4 years of age can become more difficult. If your toddler is taller than average, you may want to switch to a footless onesie.


Get Your Onesies from Little Biscuits!

You’ll find a wide variety of options for your baby’s onesies at Little Biscuits. We have a long-sleeve onesie with footies, footless onesies, and a baby bundle that includes a onesie, blanket, and lovey. Our clothing line is made of natural bamboo which helps babies control body temperature, wicks away moisture, and is soft ensuring babies are comfortable and cozy.