What is the Purpose of a Onesie

The purpose of a onesie is to allow for your baby the comfort of a shirt with the added benefit of not having to worry about the shirt riding up as well as keeping cloth diapers from falling down throughout the day. Quite often the onesie comes with “enveloped” shoulder that expands the opening where the baby’s head is fed through. This offers ease in both putting on and taking off the onesie.

Beyond answering the basics of “What is the purpose of a onesie”, let’s take a quick look at the three most important parts of what makes up a onesie. We’ll be sure to go into more details about how to take off a onesie (the answer might surprise you) and further details about them in future blogs.

Three Most Important Parts of a Quality Onesie

1. Enveloped Shoulders

To help in both putting on and taking off a onesie, be sure that you buy onesies that have enveloped shoulders. The enveloped design aids in expanding the opening around the neck out to the shoulders as seen here:

Enveloped Shoulder Onesies

2. Quality Sleeves

Onesies come with several types of sleeves and it’s important to choose a onesie with a high quality finished sleeve. Some manufacturers use a ruffles sleeve and others use a raw, or unfinished, sleeve. At Soft Bebe we use a fully finished double needle hemmed sleeve. We find that this helps with the durability of the garment.

3. Metal Snaps

There are usually a couple of options when it comes to the closures on a onesie. The most common are button and velcro closures. Of those two, button snaps usually hold up for a longer period of time. You will find snaps in two options: plastic or metal. We prefer to use metal snaps due to their durability over their plastic counterpart. We also go the extra step and color match the metal snaps to the color of the fabric.

At Soft Bebe we offer both short sleeve onesies and long sleeve onesies.


Click here to view our full product line.


  1. Tracy Johnson on August 15, 2018 at 8:42 pm

    I am confused with order sizes. So for month 1-3 I order NB?

    • Soft Bebe on August 16, 2018 at 4:14 pm

      Hi Tracy,
      You are correct. Newborn (NB) covers sizes 0 months to 3 months. If your little one is 3 months old then it might be wise to consider a small size so that they can grow into the larger size. Infant size is often difficult to “judge” because of how fast they grow. We use the World Wide Health Organization’s average height and weight chart for our sizing. If you’d like, give us a call and we can help you decide on a size that would be best. (844) 763-8232.

  2. Joy Oney on November 10, 2019 at 9:36 pm

    What size is Large equal to? I need 12-18 mos

  3. Kachina Smith on June 4, 2021 at 5:46 pm

    Can I be emailed when black onesies are back in stock?

    • Soft Bebe on June 22, 2021 at 4:35 am

      Yes, you will want to call or email us so that we have your email address.

    • Ed on July 12, 2021 at 5:44 pm

      Hello Kachina,

      Yes, we will email you when our shipment arrives.
      Take care and stay safe !!

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