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What Size Mattress Should My Child Be Sleeping On?

Kids. They grow up so fast. We are captivated when they say their first words and when they take their first steps and before we know it, they are suddenly ready to move from a crib or toddler bed to their very first “big kid” bed. Most children are ready to make this transition sometime between the age of 1 ½ and 3 ½. Whenever they do reach this milestone, we want to do our best as parents to make sure our little ones sleep both safely and comfortably in their new beds. At BedInABox®, we offer a variety of certified high quality, full size and queen size mattresses, mattress foundations, bed frames and other sleep accessories that can simplify your little one’s transition while setting them up to sleep comfortably for many years to come.

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Mattresses are an Investment

Beds and mattresses are no small investments, especially for children, and can often run hundreds or even thousands of dollars. It is important that parents make the best investment for their families, which is why BedInABox® recommends upgrading to a full size or queen size mattress for their child’s first standard size mattress, versus the typical transition to a twin size. The price difference isn’t huge. The BedInABox® Original twin size retails for $649, while the full size is priced at $799 and the queen size at $899. Essentially, you can buy a lot more bed for only $150 to $250 more. A twin size mattress measures only 75 inches long and 38 inches wide. In comparison, a full size is also 75 inches long, but measures 54 inches wide – a whole 16 inches wider – while a queen size is 80 inches long and 60 inches wide. Starting a child in a full size or a queen size bed will actually give him or her substantially more room to grow into over the years. In fact, it may even be more economical in the long run, when they outgrow a twin size bed and need a new full or queen size mattress.

Although there are several other mattress size options available, they may not be the best fit for children, your budget, or your home. Extra long twin mattresses, or Twin XL, measure slightly taller than a traditional twin size at 80 inches tall and 38 inches wide. Then there is king size at 80 inches tall and 76 inches wide and California king at 84 inches tall and 72 inches wide. While the Twin XL mattress offers extra length, the 38 inch width may become too narrow as children grow. As far as king sizes go, most kid rooms are not large enough to accommodate a king size mattress, but they are also the priciest mattress size available. For children, a full size or queen size are often the best choice in terms of mattress size and long term value.

View Mattress Size Guide

Now, it’s normal to have some hesitation about spending so much on a child’s first real mattress when you know your child may end up in your bed most nights for a while longer. Children are also prone to be messy and sometimes even rough on things around the house. The good news is that BedInABox® mattresses are made to last. They are made entirely in the USA using quality memory foam that is developed under the same roof as the mattress itself. Your child’s new BedInABox® is durable, long lasting and comes with a 20 year limited warranty. The workmanship and quality of the materials used in any BedInABox® mattresses is guaranteed for the first 10 years.

Extend the Life of your Mattress

To prolong the life of your child’s new mattress, it is important to consider pairing it with a mattress protector, especially when spills and accidents are imminent. At BedInABox®, we also offer various sleep essentials that were designed to help extend the mattress’s life. A variety of stain resistant mattress protectors are ready to ship on our website and range from $39 to $230 in price.

You may still be wondering if it really is possible to buy your little one a mattress that can last into their early adulthood. The answer is, yes, it is! While products naturally wear over time, even our high-quality memory foam and hybrid mattresses, BedInABox® mattresses were designed with durability and your best sleep in mind. So, if the mattress starts to feel softer over the years, an easy and affordable way to renew your BedInABox® is to top it with a memory foam mattress topper. We currently offer four different topper options to supplement the comfort of your BedInABox® mattress as it compresses with age.

Which Mattress Size is Right for You?

Ready for that mattress upgrade, but still unsure which size is right for you? Look no further! BedInABox® mattresses are available in the six different sizes outlined below to make the online mattress buying process easier than ever before:

The Perfect Size Bed In a Box

Twin Size Mattress

Dimensions: 38” x 75”
Shipping Weight: Around 53 lbs

Are you looking for a mattress to put in a guest room or small child’s bedroom? Trying to fit a mattress in a small space? Sleeping solo and don’t need much room? A twin size BedInABox® may be the match for you!

Twin XL Mattress

Dimensions: 38” x 80”
Shipping Weight: Around 60 lbs

A taller individual looking to fit a high-quality mattress into a small space will find comfort in a twin XL BedInABox® mattress. The go-to mattress size of most university dorms, the Twin XL mattress provides ample, extended comfort without occupying precious real estate in your sleep space.

Full Size Mattress

Dimensions: 54” x 75”
Shipping Weight: Around 74 lbs

Are you looking to upgrade your child to their first big kid bed? Are you a solo sleeper that likes to stretch out or roll around? Do you have a small pet that likes to curl up with you in bed? A full size BedInABox® mattress is ideal for you, providing more sleeping space than a twin without spending king size coin. Are you shopping for two? Consider a queen or king size instead!

Queen Size Mattress

Dimensions: 60” x 80”
Shipping Weight: Around 88 lbs

Sleeping partners, rejoice! If you and your partner want to save on bedroom space but need just enough breathing room between the two of you, a BedInABox® queen mattress is a perfect fit for you and your bedroom.

King Size Mattress

Dimensions: 76” x 80”
Shipping Weight: Around 110 lbs

Sleep like royalty on a BedInABox® king size mattress. The increasingly popular king size mattress provides tons of space for you, your partner, your kids and even your fur babies to sprawl out at night while maximizing comfort and support.

California King Size Mattress

Dimensions: 72” x 84”
Shipping Weight: Around 110 lbs

Are you interested in a king size but worried it may not be long enough? Taller individuals love our California King mattresses, delivered right to their door. Cal king mattresses are great for couples who need a little extra foot room, or for adults who co-sleep with a pet.

While BedInABox® offers these six most common mattress sizes in our online store, there are mattress sizes that measure even larger than the standard king or California King mattresses available in the mattress market. However, oversized mattresses are often custom built to pair with custom bed frames, so they are offered by fewer retailers and usually at a much higher price point. For more information on giant mattress sizes, click here.

Don’t forget to download our Mattress Size Chart, measure your space and compare those measurements to our size chart to make sure you find the best mattress size for your space!

View Mattress Size Guide

Consider BedInABox®

Here at BedInABox®, we know that while finding the perfect mattress is exciting, it can also be stressful or overwhelming. As such, we want to eliminate any risk that you feel may be associated with purchasing your new mattress. After your new BedInABox® mattress is delivered to your door within 2-5 days after purchase, we give you a full 60 to 120 days to try it out, totally risk-free. After the 60th day, if you are not completely satisfied with your new mattress, you can call us to let us know. You will receive a Return Merchandise Authorization (RMA) number, and the team at BedInABox will begin processing your mattress return. Please take the full 60 days to test nap your new mattress, as it does take some time for your body to adjust to sleeping on a new surface!

So when the time comes to transition your baby to a big kid bed or to upgrade your old mattress to something bigger and better, rest easy knowing that your BedInABox® is backed by a warranty and guaranteed to be clean, well made and long-lasting. Every component of your new mattress was made right here in the USA, the memory foam is made in-house and CertiPUR-US® certified, and your mattress is delivered with a risk-free sleep trial so you know exactly what you’re sleeping on.

Original Product Image
11” multilayer foam construction designed with CoolRest® Gel memory foam to bring you cool, comfortable memory foam support.
Starting at $561.75 $749
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Azul® Product Image
11” medium-soft multilayer foam construction with an UltraCool® soft knit cover and our most advanced cooling system to keep you sleeping comfortably.
Starting at $674.25 $899
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Tranquillium® Product Image
12” and three layers of memory foam support infused with CoolRest® technology for those seeking maximum support and comfort.
Starting at $749.25 $999
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