Which Size is Right for You?

Mattress Sizing

lady lying on a hybrid mattress in salt lake city

Whether you sleep alone or with a partner, it is important to choose the best mattress for your sleeping needs.

What should you take into consideration when buying your new mattress set?


  • The mattress should be longer than the tallest person who will be sleeping on it and wide enough so that the person has enough space to lie in their natural resting position without reaching beyond the edge of the mattress, or in the case of couples, having their elbows or knees touching. For couples, we recommend a queen, king or California king (see the difference between a king and a California kind size here).
  • The closer you get to your partner, the greater the chance for motion transfer as well as heat transfer which can disturb your restful sleep. Larger sleep surfaces reduce these factors.
  • Consider your lifestyle needs. Do you expect young children or family pets to join you in bed? If so, additional sleeping space would be required.

Young Children

  • Consider the length of time you expect to keep the mattress before replacing it. You should select a mattress that your child can grow into instead of growing out of.
  • Remember to factor in times where you may need to spend time in bed with your children, such as nighttime readings and comforting sessions. If space permits, we suggest a full size.
  • Sometimes children have accidents.  To protect your new mattress investment, we recommend purchasing a quality mattress protector.  Mattress Dealzz offers a range of affordable mattress protectors.


  • Remember that a lot of growth occurs during teenage years, so anticipate growth spurts. Select a size they will not grow out of.
  • Teenagers often use their bed for studying, reading, or even playing video games.
  • Your child may be off to college in a few years, so take into consideration that the room may be converted into a guest room. If space permits, we suggest a full-size mattress, or preferably a queen-size.

Guest Rooms

  • Consider if couples will be using the bed. If so, a full size with proper edge support would meet the minimum requirement. If space permits, a queen would be recommended since most couples sleep in a queen-sized bed. Your guests will appreciate the added space and have a more restful stay.
  • Anticipate that you may be sleeping in the guest room on occasion. Relief from a snoring or restless partner, or other times where young children may come in for comforting from your spouse or partner.
  • Children’s sleepovers where more than one child would be sleeping in the bed.

Bonus Tip: Before you decide to upgrade to a different size, make sure you’ve budgeted for new sheets, blankets, and comforters to accompany your new mattress.