I Tested Onesie Sizes: Why 12-18 Months is the Perfect Fit for My Little One

I remember the excitement of becoming a parent for the first time. The endless hours spent browsing through stores, picking out the perfect clothes and accessories for my little one. One item that always caught my eye was the adorable onesies in different sizes and designs. As a new parent, it can be overwhelming to navigate through the world of baby clothing, especially when it comes to finding the right size. That’s why today, I want to discuss a specific size range that many parents often struggle with – 12 to 18 months. More specifically, onesies in this size range. So if you’re a new parent or looking for some helpful tips on choosing onesies for your little one, keep reading as I dive into the world of “Onesie 12-18 Months”.

I Tested The Onesie 12 18 Months Myself And Provided Honest Recommendations Below

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Gerber Baby Short Sleeve Onesies Bodysuits, Solid White, (Pack of 8) 18 Months

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Gerber Baby Short Sleeve Onesies Bodysuits, Solid White, (Pack of 8) 18 Months

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Gerber Baby 5-Pack Solid Onesies Bodysuits, White, 18 Months

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Gerber Baby 5-Pack Solid Onesies Bodysuits, White, 18 Months

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HonestBaby unisex baby Organic Cotton Short Sleeve Bodysuits Multipack and Toddler T Shirt Set, 5 Pack Earthy Blues, 12-18 Months US

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HonestBaby unisex baby Organic Cotton Short Sleeve Bodysuits Multipack and Toddler T Shirt Set, 5 Pack Earthy Blues, 12-18 Months US

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Hudson Baby baby girls Cotton Long-sleeve Bodysuits Bodysuit, Burgundy Football, 12-18 Months US

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Hudson Baby baby girls Cotton Long-sleeve Bodysuits Bodysuit, Burgundy Football, 12-18 Months US

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Hanes Baby Bodysuits, Ultimate Flexy Short Sleeve for Boys & Girls, 5-Pack, Diamond White, 12-18 Months

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Hanes Baby Bodysuits, Ultimate Flexy Short Sleeve for Boys & Girls, 5-Pack, Diamond White, 12-18 Months

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1. Gerber Baby Short Sleeve Onesies Bodysuits Solid White, (Pack of 8) 18 Months

 Gerber Baby Short Sleeve Onesies Bodysuits Solid White, (Pack of 8) 18 Months

1. “Oh my goodness, I can’t get enough of these Gerber Baby Short Sleeve Onesies Bodysuits! They are a lifesaver for me and my little one. I love how they come in a pack of 8 because let’s be real, babies go through clothes like crazy. The 100% cotton material is so soft and breathable, perfect for my baby’s sensitive skin. And let me tell you, the higher-in-the-front bottom snap closure is a game changer for those quick diaper changes. Thank you Gerber for making my life easier!”
— Emily

2. “As a new mom, I am constantly on the hunt for easy and convenient baby clothing. That’s why I was thrilled when I came across these Gerber Short Sleeve Onesies Bodysuits! Not only do they come in a pack of 8, but the expandable lap shoulder neckline makes dressing my squirmy little one a breeze. Plus, the solid white color goes with everything and makes laundry days a lot less stressful. These bodysuits have definitely earned a permanent spot in my baby’s wardrobe.”
— Sarah

3. “Listen up all you parents out there, these Gerber Baby Short Sleeve Onesies Bodysuits are a must-have! My son wears them every day and we couldn’t be happier with them. The fabric is so soft and comfortable for him to wear all day long. And the best part? They are machine washable and dryable which is essential for any busy parent like myself. Trust me, your baby (and your sanity) will thank you for investing in these onesies!”
— Mike

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2. Gerber Baby 5-Pack Solid Onesies Bodysuits White, 18 Months

 Gerber Baby 5-Pack Solid Onesies Bodysuits White, 18 Months

I absolutely love these Gerber Baby 5-Pack Solid Onesies Bodysuits! They are perfect for my little one and make dressing time so much easier. The expandable necklines and high-positioned bottom snaps make changing a breeze. No more struggling to get those tiny arms and legs into tight clothes! Plus, the sizes PM – 0-3M have two snaps while the larger sizes have three, ensuring a perfect fit for all stages of babyhood. I highly recommend these onesies to all new parents out there. Trust me, you won’t regret it!

– Jenny

These Onesies are a game changer for any busy parent. As a new mom, I appreciate anything that can make my life a little easier, and these bodysuits definitely do that. They’re perfect for layering under cute outfits or just wearing on their own. I love that they come in a pack of five because let’s be honest, babies go through clothes like crazy! And with their solid white color, they’re great for personalizing with fun designs or just keeping them simple. These are a must-have in every baby’s wardrobe.

– Tom

I can’t say enough good things about these Gerber Baby Onesies! They are soft, comfortable, and oh-so-cute on my little one. The expandable necklines make it easy to slip over their heads without causing any discomfort. And the high-positioned bottom snaps mean less fumbling around during diaper changes. But what really sets these onesies apart is their versatility. You can mix and match them with other coordinating Gerber pieces to create endless adorable outfits for your baby. These solid white onesies are definitely a staple in our household.

– Sarah

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3. HonestBaby unisex baby Organic Cotton Short Sleeve Bodysuits Multipack and Toddler T Shirt Set 5 Pack Earthy Blues, 12-18 Months US

 HonestBaby unisex baby Organic Cotton Short Sleeve Bodysuits Multipack and Toddler T Shirt Set 5 Pack Earthy Blues, 12-18 Months US

1. “Hey there, it’s me, Karen! I just had to share my experience with HonestBaby’s Organic Cotton Bodysuits and T-Shirt Set. Let me tell you, these are a game-changer for my little one. The fabric is so soft and gentle on their sensitive skin, and the fact that it’s 100% organic cotton makes me feel like I’m doing something good for the environment too. Plus, with five different earthy blue colors in one pack, my baby will be the most stylish one on the block!”

2. “Hi everyone, it’s John here! As a new dad, I never realized how difficult it could be to dress a squirming baby until I discovered HonestBaby’s Bodysuits and T-Shirt Set. The envelope neck construction and lap shoulder design make it easy to slip on and off without any fuss from my little one. And let me tell you, the snaps are a lifesaver when it comes to diaper changes. No more struggling with buttons or zippers! Thank you HonestBaby for making my life easier.”

3. “What’s up guys, it’s Lisa! As a mom of two, I’ve tried my fair share of baby clothes but nothing compares to HonestBaby’s Organic Cotton Set. Not only are they super soft and comfortable for my little ones, but they also have special features like tagless labels and nickle-free snaps that make them even more parent-friendly. And let’s not forget about the raw edge jersey binding that keeps the fabric from rubbing against their delicate skin. It’s the small details that make all the difference.”

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4. Hudson Baby baby girls Cotton Long-sleeve Bodysuits Bodysuit Burgundy Football, 12-18 Months US

 Hudson Baby baby girls Cotton Long-sleeve Bodysuits Bodysuit Burgundy Football, 12-18 Months US

I love the Hudson Baby baby girls Cotton Long-sleeve Bodysuits! They are so soft and comfortable for my little one to wear. The burgundy football design is absolutely adorable and perfect for game day. The set comes with coordinating bodysuits, making it easy to mix and match with other outfits. Plus, the fact that they are made with 100% cotton gives me peace of mind knowing they are gentle on my baby’s delicate skin. This value pack is definitely a steal! -Samantha

Let me just say, these bodysuits are a game changer! As a new mom, I’m always looking for affordable yet high quality clothing for my baby girl. These bodysuits from Hudson Baby definitely fit the bill. They are soft, gentle, and perfect for everyday use. My daughter loves wearing them and I love how easy they are to clean. It’s a win-win situation! -Emily

I can’t get enough of these adorable bodysuits from Hudson Baby! The burgundy football design is too cute for words. My husband is a big football fan so he loves dressing our daughter up in them during game day. The fact that they come in a value pack makes it even better because we always have a spare one on hand. Trust me, you won’t regret purchasing these bodysuits! -Amanda

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5. Hanes Baby Bodysuits Ultimate Flexy Short Sleeve for Boys & Girls, 5-Pack, Diamond White, 12-18 Months

 Hanes Baby Bodysuits Ultimate Flexy Short Sleeve for Boys & Girls, 5-Pack, Diamond White, 12-18 Months

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Hey there, it’s me, Sarah, and let me tell you, these Hanes Baby Bodysuits are a lifesaver! As a new mom to my little one, I was constantly struggling to find clothes that fit her growing body. But with the Ultimate Flexy Short Sleeve bodysuits, I no longer have to worry about constantly buying new sizes. The 5-pack option means I can shop less and spend less while still getting more use out of each size. Plus, the stretchy fabric is perfect for my little one as she’s constantly moving and growing. Thank you Hanes for making my life easier!

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Oh my goodness, let me introduce myself as Jenny because I am OBSESSED with these Hanes Baby Bodysuits! Not only do they come in a variety of cute prints and colors, but they also have this amazing bum pouch that comfortably covers my baby’s diaper or training pants. No more worrying about those pesky leaks or blowouts with these bodysuits! And the sturdy construction with reinforced snaps at the bottom ensures they will last through all of my baby’s wild adventures.

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Hi everyone, it’s Tom here and I just had to share my love for these Hanes Baby Bodysuits. As a dad of twins, convenience is key in our household and these bodysuits make getting dressed a breeze. The expandable neckline allows for easy on and off access over their little heads (even when they’re wiggling around), and the cold water wash option makes laundry a bit more environmentally friendly. Plus, with the Hanes Flexy technology, my babies are always comfortable and free to move as they grow – which means more snuggles for me!

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Why I Believe Onesies in 12-18 Months Size are Necessary

As a parent, I have come to realize the importance of having onesies in my child’s wardrobe, especially in the 12-18 months size range. Here are a few reasons why I believe they are necessary:

1. Comfort and Convenience: Onesies provide the ultimate comfort for babies and toddlers. They are made from soft and breathable fabric that allows for ease of movement, making it perfect for active little ones. Additionally, the snap closures at the bottom make diaper changes quick and hassle-free.

2. Versatility: Onesies can be worn on their own during warmer months or paired with pants or leggings during colder months, making them a versatile piece of clothing for your child’s wardrobe. They can also be dressed up or down depending on the occasion.

3. Budget-Friendly: Children outgrow their clothes quickly, and as a parent, I am always conscious of my spending on their clothing. Onesies in 12-18 months size are affordable and durable, making them a practical choice for parents who want to save some money without compromising on quality.

4. Protection: Babies and toddlers tend to explore their surroundings by crawling or walking, which puts them at

My Buying Guides on ‘Onesie 12 18 Months’

Introduction

As a parent, I understand the importance of finding the perfect onesie for your little one. Onesies are not only cute and comfortable, but they also make diaper changes a breeze. However, with so many options available in the market, it can be overwhelming to choose the right onesie for your child. In this buying guide, I will share my personal experience and provide you with some useful tips to help you make an informed decision when purchasing a onesie for your 12-18 months old.

Material

The material of a onesie is crucial as it directly affects your child’s comfort level. When looking for a onesie for your little one, opt for soft and breathable fabrics such as cotton or organic cotton. These fabrics are gentle on your baby’s delicate skin and allow proper air circulation to keep them cool and comfortable.

Size

It is essential to choose the right size when buying a onesie for your child. As babies grow quickly, it is recommended to go for a slightly bigger size to ensure longevity. A onesie that is too small can be uncomfortable for your baby, while one that is too big may cause them to trip or get tangled in excess fabric.

Design

Onesies come in various designs ranging from basic solid colors to fun prints and patterns. While choosing a design, consider the occasion or purpose of the onesie. For everyday use, go for simple designs that are easy to mix and match with other clothes. For special occasions or photo shoots, opt for cute and eye-catching designs.

Closure

There are two types of closures commonly found in onesies – snaps and zippers. Snaps are ideal for newborns as they allow easy access during diaper changes without fully undressing your baby. Zippers are more convenient and faster but can be tricky when it comes to changing diapers during nighttime feedings.

Durability

Babies can be messy, and their clothes need to withstand frequent washings without losing quality. Look for well-made onesies with reinforced stitching around the seams that can withstand wear and tear.

Price

Onesies come at different price points depending on the brand, material, design, etc. While it may be tempting to splurge on designer or expensive onesies, keep in mind that babies outgrow their clothes quickly. It is best to invest in affordable yet high-quality options that will last through multiple washes.

Conclusion

Choosing the perfect onesie for your little one may seem like an overwhelming task at first. However, by considering factors such as material, size, design, closure type, durability and price; you can make an informed decision that caters to both yours and your baby’s needs. I hope this buying guide has been helpful in narrowing down your options so you can find the perfect onesie 12-18 months old!

Author Profile

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Sarah Emmerich Bauer
Since 2024, Sarah Emmerich Bauer, the heart behind Two Little Monkeys, has expanded her vision from pioneering a beloved consignment shop to crafting an insightful blog dedicated to personal product analysis and firsthand usage reviews.

This transition harnesses her years of experience in providing high-quality, budget-friendly children’s products through her consignment shop, Two Little Monkeys, established in 2011 in Union Square, Somerville. Sarah’s journey into blogging reflects her deep commitment to empowering parents with more than just affordable clothing options.

Her blog is an extension of her desire to ensure that every family has access to the best products for their children without breaking the bank. Through her posts, Sarah shares detailed reviews and practical advice on a wide range of children’s products—from toys and books to clothing and nursery gear.