Kindergarten Backpack Size – What Backpack Size is perfect for Kindergarten?

Last Updated on May 22, 2023 by Taj Uddin Ahmed

We know that children love to carry their stuff around with them. This is why we have backpacks. But what size should you get your child’s backpack for Kindergarten? Well, it depends on the age of your child. In fact, the right backpack size can make or break a child’s ability to carry their stuff around. So, you need to consider kindergarten backpack size so that the backpack is a perfect fit. Another question can be is – what backpack size is perfect for kindergarten? Well, in this post, we will discuss how to choose the right backpack size for kindergarten for your child based on their age.

Kindergarten Backpack Size

If you’re a parent, you know that choosing a backpack for your child is an important decision. You want to make sure it’s comfortable, durable, and functional. But what size backpack should you buy? There are a lot of factors to consider, including the age of your child, the number of items you plan to carry, and the style of backpack you’d like. Besides, it is crucial for a kindergarten kid to know how to fit a backpack properly because it can help avoid back pain as well as other complicated issues. In this article, we’ll share with you the answers to these questions and more.

What Backpack Size is perfect for Kindergarten?

When it comes to choosing a backpack size for your child’s first year of school, you’ll want to be sure that your child has a comfortable fit and can easily access their school supplies. In addition to a comfortable fit, you’ll also want to make sure that you choose a backpack that will last through the years—and that your child will grow into. So, what size should you buy your child’s backpack for kindergarten? Besides, your kid needs to know how to wear a backpack properly.

Do you know what – sometimes kids can use their kid’s backpacks as a diaper bag. Funny, right?

If you’re looking for a backpack for your little one, it’s important that you consider what size will work best for them. As a parent, you want to make sure that the backpack you choose will fit well and that your child can easily access the items inside.

As a parent, you want your child to have the best start in life. One of the things you’ll want to do is buy your child the right backpack for kindergarten. It’s important to make sure that the backpack you choose fits your child well. This article will help you to know what backpack size is perfect for kindergarten.

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How to Measure Your Child’s Height for the Right Backpack for Kindergarten 

In order to choose the best backpack for your child, you have to know how to measure his or her height accurately. This is important because a backpack size that’s too small will not allow your child to carry everything he or she needs. This is not the right choice for a child. On the other hand, a backpack size that’s too big will be uncomfortable for your child. It’s also not the right choice for a child. That’s why measuring your child’s height is important. So, let’s start with how to measure your kid’s height for the right backpack sizing.

Measure The Kid’s Back Height

When you’re shopping for your kid’s school bags, keep in mind the length of your child’s shoulder line and waist. The waistline is the part that is located around the pelvic bone, while the shoulder line is in the middle of the body, between the neck and shoulder. Some bands are hung low, some high, and others are just right. Add additional inches to this length to make sure that your child gets the right size school bag. Your child will appreciate having a proper school bag if he or she has a longer, straighter torso.

Measure The Kid’s Back Width

There are many ways to determine your child’s backpack size. However, the correct method to measure your kid’s back width is by measuring a child’s shoulders that is around the ridges. Anyways, I would add one or two inches to this number to fit properly and you know it is very acceptable.

To measure your kid’s back width, if you don’t have the necessary tools or your kid can’t stay in position, you can use this simple chart to help you find the best possible solution. However, it’s much easier to get these metrics than you might think.

In short, if your children’s spine is about 12 inches long and about 6 inches wide, you should buy a backpack that will accommodate that size.

Well, you can use these helpful backpack charts to help determine the correct sized backpack for your child:

kindergarten backpack size for kids
(W x D x H)
8.5” x 4.25” x 10.75”12” x 6” x 15”13.75” x 7.5” x 17”13” x 7” x 18”
(W x D x H)
8” x 3.75” x 10.25”11.5” x 5.5” x 14.5”12.5” x 6.5” x 16.5”12” x 6” x 17”
Shoulder Straps (2)
(W x L)
2.2” x 12-19.5”2.5” x 17.25-32.25”3” x 18-34”3” x 21-34”
Carrying Handle
(W x L)
1” x 6”1.25” x 7.5”1.5” x 6.25”1.5” x 8.75”

Read to know more.

Standard Backpack Sizes for Kindergarten Children

When kids grow out of the standard-sized backpack, parents may feel the need to upgrade to a large Kindergarten backpack. If you are currently shopping and have not yet measured your child’s height or weight, then follow this handy guide below.

Child’s AgeBackpack Height Backpack Width
4-5 Years Old 11 Inch6 Inch
5-6 Years Old 12 Inch6 – 6.5 Inch
6-7 Years Old 12 – 12.5 Inch7 Inch
7-8 Years Old 13 Inch7 Inch

Average Child Back Sizes for Backpacks by Age (in inches)


Different Sizes of Backpacks

We will be discussing here different sizes of backpacks for kindergarten kids. The categories will be based on the ages of the youngsters. You can simply guess and pick a school bag for your boys or girls. If the above methods are not applied, this method can help you choose the best backpack for kindergarten. Then let’s find out.

The backpack for kindergarten will be categorized into 3 sizes:

  1. Small Backpacks (15-20 liters)
  2. Medium Backpacks (21-30 liters)
  3. Large Backpacks (31-40 liters)

We will now elaborate on the points so that you can easily understand which one is the best for what ages of children.

Small Backpacks (15-20 liters)

As a rule of thumb, the preschooler’s backpacks should be large enough to carry a normal-sized folder that will be used to transport papers and messages home. In this case, a small backpack can contain at least 15-20 liters of stuff. This backpack will carry a packed lunch, and a couple of textbooks, and it will be comfortable to use for a long time. You can also follow the standard backpack sizes for kindergarten children. It would be helpful too.

Medium Backpacks (21-30 liters)

Believe it or not, this size means that medium-sized backpacks that can hold at least 21-30 liters of necessary items are the most popular form of a backpack for kindergarteners. Guardians usually choose this Kindergarten backpack size because it can hold a few textbooks and their daily necessities. Besides, kids can carry a tab or even a laptop too. Undoubtedly, these medium bags are quite valuable for the backpack size for 12 years old or above kids.

Large Backpacks (31-40 liters)

One of the most important phases for a kindergarten kid is Elementary school. However, Elementary students usually use bigger backpacks. We know, teens often have so much stuff to carry and they fill up their entire bags with their necessary items. That’s why you must be sure that the adjustable straps on your kid’s new backpack are strong and have great quality. Buying a pack with high-quality adjustable straps and an anatomical fit is highly important right now.

Important Factors to Consider When Buying a Kindergarten Backpack Size


What comes first to consider your kid’s kindergarten backpack size is comfort. So, when you are choosing a backpack size by age, you should focus on some important factors. However, Backpacks have evolved over the years. These days, backpack owners are looking for comfortable ergonomic fits and cushioned straps. When it comes to your kid’s bag, there are different types of backpacks and each one has its own advantages. The huge, padded straps are helpful for carrying backpacks on long walks or runs. The padded shoulder straps can help kids comfortably carry the backpack. The straps on a baby carrier should not be too broad and need to be adjusted based on your child’s age and size or else they could slide off the shoulders.

Storage Capacity

It is important that your kid have storage space for his/her classroom items. How many books can a backpack hold? Most schools have storage places for kids to store their daily classroom items. There are many different types of school lunches that a child can bring to school. There is no need to transport these products into and out of school daily. Another way is to ensure that nothing goes under the radar! Make sure your Preschooler has a backpack full of school supplies, a few books, and a bottle of water whenever it refers to your Preschooler’s backpacks.


Backpacks are always getting bigger, so check out this Kindergarten backpack size that includes stretchy straps for maximum comfort and convenience as your kid grows during the school year! We highly recommend using a pack with a chest strap that can be firmly attached to a child’s back to ensure the load is evenly distributed when your child is carrying a heavier load.


Almost all backpacks aren’t built to withstand being tossed around by a kid for a whole school year. If your child carries a backpack through the rain for a whole school year, he/she needs a kindergarten backpack that can withstand wear and tear. So, as a guardian, you need to choose a backpack composed of durable material, like water-resistant nylon or polyester.


School packs are a perfect opportunity for kids to show off their friends, display their school spirit, and demonstrate their talents. There are a variety of designs available, from embroidered patterns and character-themed backpacks to bags with particular sections, such as soccer kits.

In addition, this bag features a few extra features, such as caster wheels or luminescent closures, so it should be easy to get wherever you’re going. If your child has their own backpack they enjoy, then make it easier to find the backpack. Have it easily accessible so you and your child can complete a fun activity together. It is always wise to be aware of any limits or requirements that the school might have.

Impact of Inappropriate Backpack Size on Your Child’s Spine

Back pain in children is on the rise. According to one of the studies of the University of California – “One-third of all children age 11-14 report back pain”.

People specifically kids are having such back pain due to carrying the overload of their backpacks. The question demands – why is a heavy backpack an issue?

The force of a heavy backpack is a lot like having a weight on your back. It compresses the spinal discs and puts a lot of pressure on them. Heavy backpacks can cause your muscles to strain. In addition, it can cause the natural curves of your spine to distort and compress the intervertebral discs, which are the shock absorbers between your vertebrae.

When children have heavy backpacks they are likely to lean forward, which causes rounded shoulders and leads to an overly curved upper back. This makes it harder for children to carry their bags, and the heavier bag compresses the spine.

Falling and hitting the ground are often the first reactions that we have to something unexpected and scary.

In addition, when it comes to using a backpack, it’s best to use a two-strap backpack to evenly distribute the load, thus preventing strain on the neck and shoulder muscles.

Moreover, if a child wears a backpack using only one strap, he or she will develop a leaning posture. This can strain the neck and shoulder muscles, and it’s a good idea to teach your child how to wear a backpack with two straps, which distribute the weight more evenly.

However, there is good news!

The damage caused by carrying a heavy load backpack to the students is completely reversible. You just need to follow the instructions above. Just know the best Kindergarten Backpack Size and the best backpack for kindergarten. Hopefully, you can get cured gradually. So, be careful about choosing the best kindergarten backpacks for your kids.

What to Do To Avoid Kid’s Back Pain

By following some instructions, you can easily avoid such unexpected situations. Your kids would be always healthy and free from back pain if you do these.

  • You need to buy a perfect-size backpack (not too big nor too small) for your kids
  • Try not to let your children overpack their backpacks (the lighter they pack, the better)
  • Persuade them to skip unnecessary items so that the bag doesn’t get too heavy
  • Teach them to organize their stuff so that they can carry all the items they need but it must not be too much heavy

If your kid can simply follow these instructions, they will be free from any bad cause. So you make sure they abide by the rules.

What Size Backpack for Kindergarten: Important Things to Remember

Apart from sizes, you should also focus on some important factors before choosing a backpack for your kindergarten child. Read these carefully.

  • The average backpack size for kindergartners is 22 liters.
  • Any child should carry a backpack that would be within the limits of 15 percent of his/ her body weight.
  • Always try to use a quality backpack because it can save you a lot of money from being torn apart so soon.
  • A reflector in a backpack is an essential part. So when you are going to buy a bag, make sure that it has a built-in reflector. Well, if it doesn’t, get one and fix it onto the bag. Reflectors improve visibility and are particularly important for children who walk to school or use a bus.
  • Backpacks with pads and waist belts are helpful and effective for kindergartners to carry all day long.

These simple things are worth remembering for your children. A slight indifference can cause harm to your kids. So, be careful and do whatever you have to do to keep your little ones safe.

Frequently Asked Questions

1. Do Kindergarten Kids Need Backpacks?

Though kindergarten children are small nevertheless they need backpacks too for keeping some important items such as books, lunch boxes, water bottles, etc. But yes, they use small backpacks according to their age and size.

2. What size backpack is good for a 4-year-old?

The answer to this question is not applicable all the time because all 4-year-old kids are not the same in size, height, and physical health. But, yes, if you follow the standard backpack sizes for kindergarten children, a 4 year old child will simply need a backpack that is (11 x 6 inches) in height and width respectfully. Again, if you follow the average child’s back sizes for backpacks by age, well, a 4 year old kid’s back should be (H x W – 11″ x 6″) as well. And if you want a guess and buy a backpack for your 4-year-old kid, you should choose small backpacks that can hold at least 15-20 liters of necessary items.

3. How many inches should a kindergarten backpack be?

It really depends on the individual child’s size and needs. The ideal size for a Kindergarten backpack is between 12 and 16 inches tall and 10 and 12 inches wide. There are many factors to consider when choosing the best backpack. When looking for a backpack, it’s important to choose a lightweight backpack with wide, adjustable straps.

4. At what age do kids wear backpacks?

Starting around age four, most kids get backpacks to carry their school supplies, so it’s important for children to have a good and small backpack. When kids are ready to start carrying their own books to school, they’re old enough to start. Some kids may need to use a backpack sooner if they are enrolled in a preschool or daycare program while others may not need to use a backpack until they reach middle school.
Now the choice is yours.

Final Words

In conclusion, the size of a backpack depends on a number of factors, such as the age of the child, the weight of the child, the type of activity, the length of the trip, the number of items carried, and the weather conditions. In my point of view, a kindergarten backpack size should be about 20-25 pounds which are perfect for Kindergarten children. The reason is that a backpack that’s too heavy can be a burden to your child. So, when your kid starts kindergarten, make sure that the backpack that you are buying is appropriate for your child’s weight and height. Too much small or large backpacks for kindergarten kids can be bothering for them. 

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Last update on 2023-05-30 / Affiliate links / Images from Amazon Product Advertising API