how many onesies do i need

How Many Onesies Do I Need?


Onesies are one of the essential pieces of clothing for infants, designed to provide both comfort and convenience. A onesie is a one-piece garment that covers the baby’s torso and has snap closures at the bottom for easy changing. In this article, we will discuss how many onesies you need for your baby and other factors you need to consider before buying them.

As a new parent, you might be overwhelmed with countless questions about taking care of your newborn. Deciding how many onesies you should have on hand might seem trivial, but it can save you time and money in the long run if you get it right.

Factors to Consider Before Buying Onesies

Before purchasing onesies, there are some essential factors you need to weigh to ensure that your baby’s needs and preferences are met. Getting a good grasp of these factors will help you make informed decisions and choose the right onesies for your baby.

1. Age of the Infant

The age of your baby plays a vital role in determining the number of onesies needed. Newborns require more frequent changes than older babies since they tend to make a mess often. As your baby grows, they’ll require fewer pieces.

2. Weather or Climate Condition

The weather or climate condition of your location determines the types of clothes that suit your child best. Some regions experience hot, dry summers; others may experience cold winters. Ensure you pick materials and styles that will keep your child comfortable during each season.

3. Quality and Durability

You want to invest in quality onesies that can withstand repeated washing, wear and tear, and still stay comfortable for your baby’s delicate skin. Cotton is an excellent choice of fabric that is gentle on the skin, breathable, absorbent and long-lasting.

4. Number of Laundry Days within a Week

The number of times you do the laundry during the week should determine the number of onesies you have. You want to ensure that you have enough onesies to last a few days before the next laundry load while still ensuring that your baby is clean and fresh.

Minimum Number of Onesies Required

The minimum number of onesies needed depends on several factors, as stated above. We’ll break it down into two categories: newborn babies and older babies.

1. Minimum Number for a Newborn Baby

Newborns require more clothing changes since they tend to spit up or leak through their diapers frequently. For this reason, it’s advisable to have extra pieces on hand in case one needs changing during the day or night.

We recommend that you have between 10-14 onesies for your newborn baby, Five will be short-sleeved, and five will be long-sleeved. New parents may invest in some side-snap newborn shirts that do not go over the head but button at the side, making it easier to dress a delicate baby without fussing with them too much.

Explanation of Why a Newborn May Require More Onesies than Older Babies:
  • Newborns typically sleep 15-19 hours a day; they spend most of their time lying down; thus, they produce more dirt and stains.
  • They usually have several outfit changes per day due to diaper leaks or spit-ups.
  • If your child has sensitive skin or food allergies, they may require more frequent changings and fresh clothes.

2. Minimum Number for an Older Baby

As your baby grows, you’ll need fewer onesies as their feeding and sleeping patterns become more regular, and their bodies adjust to the environment. Depending on your location, you should have a few more long-sleeved or short-sleeved onesies on hand in case of unpredictable weather.

Here’s what we recommend:

  • 0-3 months: 10 short-sleeved, 5 long-sleeved
  • 3-6 months: 8 short-sleeved, 4 long-sleeved
  • 6-9 months: 8 short-sleeved, 4 long-sleeved
  • 9-12 months: 8 short-sleeved, 4 long-sleeved

Note that these are rough estimates, and you might want to stock up on a few additional pieces if you’re dealing with teething or other health issues that might require frequent changings.

Types of Onesies Available

There are various types of onesies available in different styles suitable for different occasions. Here is a brief overview of some popular options:

  • Traditional Onesie: This is the classic and most common version that covers all of the baby’s body from shoulders down to the feet. It has snap closures at the bottom for quick diaper changes.
  • Bodysuit: Similar to traditional onesies but designed to look like t-shirts with snap closures at the bottom for diaper changes.
  • Romper: These are typically short-sleeved or sleeveless onesies with legs that resemble shorts, ideal for warmer weather.
  • Sleep and Play: These onesies come with long sleeves and footed bottoms, designed for sleepwear or lounge wear.
Recommended Type(s) based on Age and Season:
  • Newborns: Side snap shirts are an excellent option for newborns, particularly if you’re dealing with a sensitive baby. Regular size Onesies might be a bit too long at this stage.
  • Cold weather: Bodysuits with long sleeves and pants such as Sleep-and-Plays would work perfectly.
  • Hot weather: Short-sleeved Rompers or Bodysuits made of lightweight cotton work best. You can also opt to have diaper covers instead of pants to allow more air circulation around the baby’s bum area.

Colors and Designs for Onesies

The color and design of the onesies you choose largely depends on your preference. Here are some popular options:

1. Popular Colors and Designs:

  • Pinks and purples for girls, blues and browns for boys.
  • Nature prints such as animals or simple designs for gender-neutral babies.
  • Bright colors such as yellow, orange, green, or red for enhanced visual stimulation
  • Plain/ neutral colors such as gray, white, black, or pastels to make it easier to mix and match outfits.

2. Gender-Neutral Options:

You might consider neutral colors and prints if you prefer keeping your baby’s gender private. They also come in handy if you plan on having multiple children that can share the same clothes without gender biases.

3. Advantages and Disadvantages of Getting Plain/Neutral-colored Ones vs. Colorful/Printed Ones:

  • Plain/neutral-colored ones:
    • Easier to match with other clothing items.
    • Can be passed on to other babies
    • Less visually stimulating for infants
  • Colorful/Printed Ones:
    • Provide visual stimulation for babies
    • Easily spotted by other caregivers or during laundry time
    • Potentially less gender-neutral depending on the color and print.

Choosing the Right Material

The comfort of your baby should be a significant consideration when choosing material. Babies have sensitive skin, so it’s best to choose soft, organic materials such as cotton or bamboo.

Cotton is the most popular material used for onesies due to its breathable, hypoallergenic, and easy-care properties. Other options include high-quality polyester blends or spandex that provide stretchy and easy-fit comfort.

Ideal Material Depending on Weather and Skin Condition of the Baby:
  • Cotton or bamboo: Softness makes them an excellent option for hot weather conditions since they are lightweight and breathable. These materials also wick away sweat and promote air circulation, perfect for delicate skin.
  • Polyester blend: Ideal for cold weather since it provides added warmth to the baby’s body. It’s not as breathable as cotton but can be soft and gentle on the skin if blended appropriately.

Considering Growth Spurts

Babies grow fast, and onesies that fit them perfectly today, might not fit them tomorrow. Choose onesies that have ample allowance around the neck, arms, and legs to account for growth spurs.

You should consider buying a size or two larger than your baby’s current size to keep up with their growth rate.

Picking Sizes That Fit Well

Finding the right onesie size can be tricky since babies come in different shapes and sizes. Here are some tips you can use to ensure you get the right size:

1. Knowing the Baby’s Measurements

Having accurate measurements of your baby is essential before choosing an appropriate size for their onesies. Measure both their height and weight regularly to keep track of growth progression. Use these measurements alongside the manufacturer’s size chart to select a perfect fit.

2. Understanding Size Charts

Most manufacturers have a size chart with recommendations based on the baby’s weight and height. Double-check the chart before placing your order because sizes vary from brand to brand.

Budgeting for Onesies

The cost of onesies depends on several factors such as material, style, quality, and brand. Establishing a budget beforehand saves you money while guaranteeing quality purchases for your infant.

Estimated Cost Range for Reasonable Quality Onesies

  • Plain/Basic Onesies: $4-$10 per piece
  • Designer/Printed Onesies: $10-$20 per piece
  • Boutique-Like or Organic Onesies:$20-$40 per piece

You should find out if the retailer has any bulk purchase benefits such as discounts, free shipping, or cashback incentives. Stocking up on onesies in bulk could save you some more for future purchases.


In conclusion, onesies make up a considerable part of your infant’s wardrobe and should be selected keenly to ensure they meet your baby’s needs. Knowing how many onesies you need for your baby can save you time and money while making sure that your child is comfortable at all times.

We’ve outlined some critical factors such as age, weather or climate condition, quality and durability, number of laundry days within a week that you should consider before buying onesies. It would be best to choose a reliable material, style, color, and size that match your preference and suit your child’s needs.

After reading this article, we hope that you feel more informed and confident about selecting the right onesies for your baby!

Frequently Asked Questions: How Many Onesies Do I Need?

As a new parent, you may be wondering just how many onesies your little one will need. Below are some frequently asked questions to help you determine the answer!

1. What is a onesie?

A onesie is a one-piece garment that covers a baby’s torso and typically has sleeves and snap closures at the bottom for easy diaper changes.

2. How many onesies do I need?

  • You can never have too many onesies! Babies go through several outfits a day due to spit-ups, leaks, and other messes.
  • We recommend having at least 10-12 onesies on hand in each size.
  • If you plan on doing laundry every day, you may be able to get away with fewer.

3. What sizes should I buy?

  • Newborn sizes are great for babies under 8 pounds. However, many babies outgrow them quickly, so it’s best to have a few on hand just in case.
  • 0-3 months will likely be your most-used size in the first few months of your baby’s life.
  • 3-6 months size can be great for when your baby starts to grow out of their newborn and 0-3 month sizes.

4. Should I go for plain or patterned onesies?

This comes down to personal preference! Both plain and patterned onesies can be great options. Patterned onesies can help hide stains while plain onesies are more versatile and can be dressed up with other clothing items.

5. What fabrics should I look for in onesies?

  • Cotton is a great option as it is soft, breathable, and easy to care for.
  • Bamboo is another great breathable option that is also eco-friendly.
  • Stay away from synthetic fabrics like polyester which can trap heat and make your baby uncomfortable.

6. Do I need different types of onesies for different seasons?

It’s a good idea to have both short-sleeved and long-sleeved onesies on hand so that you can dress your baby appropriately for the weather. Additionally, lightweight cotton or bamboo onesies are great for summer while thicker cotton or fleece-lined onesies can help keep your baby warm in the winter months.

7. Any other tips on how to care for onesies?

  • Wash your onesies before your baby wears them to remove any chemicals from production.
  • Avoid using fabric softeners as they can irritate your baby’s sensitive skin.
  • Use a gentle detergent and wash in cold water to help preserve the colors and prevent shrinking.

We hope these FAQs have helped answer any questions you may have had about how many onesies you’ll need for your little one. Happy shopping!

keys takeaways

Four Key Takeaways: How Many Onesies Do I Need?

  1. It depends on how often you want to do laundry. A good rule of thumb is to have at least 5-7 onesies in each size.
  2. Consider the season and climate. If it’s hot and humid, your baby may go through more frequent outfit changes and need more onesies.
  3. Remember that babies grow quickly and may outgrow certain sizes faster than others. Keep this in mind when building your onesie collection.
  4. Don’t forget about practicality! Look for onesies with snap closures for easy diaper changes, and choose fabrics that are soft, comfortable, and easy to care for.

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