Woman laying on top of a Serta Five Star Mattress in Box reading a book.

Mattress in a Box

From box to bed in secondsâ„¢. Designed to expand quickly with an individually-wrapped coil system and 3 zones for lower back support.

1 product

Mattress size guide

  • Outline icon of a twin bed

    Twin

    74.5" L x 38" W

    Best for kids and limited sleeping space.

  • Outline icon of a twin XL bed

    Twin XL

    79.5" L x 39" W

    Best for college students, single adults living in a small space and those with a split king adjustable bed frame.

  • Outline icon of a full size bed

    Full

    74.5" L x 54" W

    Best for growing kids, young adults, couples who don't need a lot of space to move around and guest bedrooms.

  • Outline icon of a queen bed

    Queen

    79.5" L x 60" W

    Best for couples and single sleepers who like space to roll around.

  • Outline icon of a king bed

    King

    79.5" L x 76" W

    Best for couples who like their own space to spread out and parents who co-sleep with children and room for pets.
A man and his wife lay on a Serta iComfort mattress. The man is cuddling his orange cat while his wife reads a book.

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