Size Guide: Should You Opt For A King Size Mattress?

Family playing in bed under a sheet.

by Sleep First 4 min read

A common mistake that people make when shopping for a new mattress is getting one that's too small for their needs. Choosing a mattress that's too small for your needs can seriously disrupt your sleep, leaving you grumpy, sleepy, and annoyed at your partner for elbowing you 15 times during the night.


The general rule of thumb is that for maximum comfort, you should opt for the biggest mattress you can given the restraints of your space and your budget. Today, we're finishing up our series on mattress sizes with the biggest size you can get: the King or California King mattress.


King size mattresses provide the most sleeping room of all standard sized mattresses. They measure 76 inches wide and 80 inches long, making them a whole 16 inches longer than a Queen. If you're looking for something with a little extra length, you can opt for a California King, which comes in at 84 inches long and 72 inches long.


Both King and California king mattresses provide maximum sleeping room for couples, kids, and even the family pet. They work great in primary bedrooms, and are perfect for families and couples who like their personal space.


So, who should consider sizing all the way up the very top?


Mattress Size Guide

 Room for the Whole Family 


If you have kids or pets (or both!), you might want to consider a King size mattress. With a Queen, it doesn't take a lot for things to get crowded. Add in a kiddo who woke up from a nightmare or your beloved golden retriever, and suddenly someone is getting crowded off the edge.


When you size up to a King, you'll have more than enough room to accommodate everyone when the sniffles are going around, when the kids want to cuddle with mom and dad on a Sunday morning, or during family movie night. Pass the popcorn!


Mother and daughter reading a book at nighttime.

Couples Who Like Their Personal Space, Thank You Very Much


Although it seems like a Queen size mattress is plenty big, most people don't realize what it's true dimensions actually are. Queen mattresses are only 60 inches wide, leaving each half of the couple with only 30 inches each (smaller than a twin!). This isn’t bad for couples who love to cuddle, but what about the ones that crave a little personal space?


A King mattress gives you 30% more sleeping space, allowing you to doze in peace. Additionally, if you're the kind of couple who like to do other things in bed, like reading or watching TV, it's nice to have space to spread out and really enjoy your time. 


Happy woman lying and resting on a bed.



For many people, between sleeping and relaxing at night their bed is a place they spend a significant amount of their time. A King mattress maximizes both the comfort and the utility of your bed, leading to better sleep and overall greater satisfaction. Plus, by investing in a King or California King mattress now, you’ll have more than enough room to grow - which will likely save you money down the road!


At Sleep First, we're making it even more affordable. Right now you can get a King for the price of a Queen, plus a free adjustable base! Find a store now or chat with us to check inventory.

Whether you should opt for a twin, full, queen, or king depends on your unique preferences, budget, and living space. The best way to know which mattress size fits just right is to come into a store and test out the options for yourself. When you’re ready to find your next mattress, come visit us at your nearest Sleep First, where we’ll be waiting to help you guide you towards your best sleep ever.

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