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Mattress Sizes and Bed Dimensions: Finding the Perfect Fit for Your Space

CEO Khai Intela
This guide will break down each mattress and bed size dimensions and specs to give you all the details you need to make an informed decision. Finding the right mattress size is crucial for your...

This guide will break down each mattress and bed size dimensions and specs to give you all the details you need to make an informed decision. Finding the right mattress size is crucial for your comfort and quality of sleep. Whether you're a single adult, a couple, or have children or pets, there is a mattress size that will suit your needs.

SO GeneralMattressGraphics MattressSizeGuide Image: Mattress Size Guide

Twin Size Bed Dimensions

A Twin size mattress measures 38” W x 75” L. It's the smallest adult-size mattress and is suitable for toddlers, children, and single adults. It's commonly used for daybeds, bunk beds, dorm rooms, or small guest bedrooms. The best part is that a Twin size mattress can provide a luxurious feel without costing as much or taking up as much room as larger mattresses. Check out our top picks for the best twin-size mattress!

Twin XL Size Bed Dimensions

A Twin XL size mattress measures 38” W x 80” L. It has the same width as a traditional Twin but is 5” longer in length. This makes it a great option for taller adults who need the extra legroom. Keep in mind that not all sheets and comforters are available in Twin XL size, so be sure to double-check before shopping for bedding.

Can you use two Twin XL mattresses on a King size frame?

Yes! Two Twin XL mattresses can be used to create the dimensions of a King size mattress. This is a popular choice for sleeping partners who have different firmness preferences. It's also a great option for those who want to use an adjustable bed frame. The separate mattresses allow sleepers to sit up or lie back without disturbing their partner. You can use individual Twin XL bedding sets or a single King size sheet set. Our top recommendation for this setup is the Twin XL Helix Midnight mattress.

Full Size Bed Dimensions

A Full size mattress measures 54” W x 75” L. It's also referred to as a "standard double." This size is suitable for single active sleepers who like to have ample space or for couples who have a small bedroom. However, if you share the bed with children or pets, a Full size mattress may feel a bit cramped. Consider these specs: for single sleepers, that's 54” of sleeping space, and for partners, that's 27” of sleeping space per person (11” less than a Twin size mattress). Check out our top picks for the best full-size mattresses!

SO GeneralMattressGraphics Twin Image: Twin size mattress

Queen Size Bed Dimensions

A Queen size mattress measures 60” W x 80” L. It's currently the most popular mattress size in the United States. This size offers a comfortable fit for single active sleepers, couples, and those who share the bed with children or pets. To comfortably fit a Queen mattress, it is recommended that your bedroom be at least 10’ L x 10’ W. For single sleepers, that's 60” of sleeping space, and for partners, that's 30” of sleeping space per person (8” less than a Twin size mattress). Check out our top choices for the best queen-size mattresses!

King Size Bed Dimensions

A King size mattress measures 76” W x 80” L. It's an excellent choice for single active sleepers and couples who share the bed with children or pets. To comfortably fit a King size mattress, it is recommended that your bedroom be at least 12’ W x 12’ W. For single sleepers, that's 76” of sleeping space, and for partners, that's 38” of sleeping space per person (the same width as a Twin size mattress). Check out our picks for the best king size mattresses of the year!

Split King Size Bed Dimensions

A Split King size mattress consists of two identical-sized mattresses, each measuring 38” W x 80” L. When joined together, they equal the size of a complete King size mattress. This option is perfect for sleepers who have different sleeping preferences than their partner. The split mattress allows each sleeper to have a mattress that suits their individual needs without compromising their partner's sleep. Some couples may opt for a flippable mattress that offers different firmness on each side. However, finding sheets for this style of mattress can be a challenge. Nectar offers a Split King adjustable frame that allows you and your partner to sleep in your preferred positions. Make sure to add the adjustable frame to your cart with any mattress purchase.

California King Size Bed Dimensions

A California King size mattress measures 72” W x 84” L. It's an excellent option for taller sleepers or those who prefer extra length in their mattress. While it's 4” longer than a standard King size mattress, it's actually narrower by 4”. To comfortably fit a California King size mattress, it is recommended that your bedroom be at least 12’ W x 12’ L. For single sleepers, that's 72” of sleeping space, and for partners, that's 36” of sleeping space per person (2” less than a Twin size mattress). Check out our picks for the best California king mattresses!

SO GeneralMattressGraphics Queen Image: Queen size mattress

What Size Mattress Do I Need?

When determining the right mattress size for you, it's essential to consider the size of your room and who will be sleeping in the bed.

What is the size of your room?

To fit a Queen size bed, your room should be at least 10’x10’. For a King or California King size bed, your room should be at least 12’x12’. Here are scaled images to give you an idea of how much space a Queen size bed will take up in both a 10x10' and 12x12' bedroom, as well as a King size bed in relation to those room sizes.

SO GeneralMattressGraphics2 Queen SO GeneralMattressGraphics2 King

Who will be sleeping in the bed?

Different mattress sizes are more suitable for certain situations. Single sleepers have several options, while couples with or without children or pets may prefer larger sizes. Consider the following:

  • Children: Twin, Twin XL, Full
  • Single adults: Twin XL, Full, Queen, King
  • Beds with two adult sleepers: Queen, King, California King
  • Beds with two adult sleepers and children or pets: King, California King
  • Sleepers who want a mattress that works with an adjustable frame: (2) Twin XL mattresses, Split King

Mattress & Bed Dimensions Summary

There is no right or wrong answer when it comes to choosing the perfect mattress size. It depends on various factors such as room size, sleeper size, future growth, and personal preference. Take the time to consider all these factors to determine which size mattress would be the best fit for you. Sweet dreams!

*Note: The original article and images were sourced from Saigon Intela.

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