Firm Mattresses

Firm Mattresses

29 products

Shop by size

  • Outline icon of a twin bed

    Twin

    74.5" L x 38" W

    Best for kids, day beds, bunk beds or limited sleeping space.

    Shop Twin 
  • Outline icon of a twin XL bed

    Twin XL

    79.5" L x 38" W

    Best for taller kids, dorm rooms or those with a split king set up.

    Shop Twin XL 
  • Outline icon of a full size bed

    Full

    74.5" L x 53" W

    Best for young adults, a first apartment or a guest bedroom.

    Shop Full 
  • Outline icon of a queen bed

    Queen

    79.5" L x 60" W

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

    Shop Queen 
  • Outline icon of a king bed

    King

    79.5" L x 76" W

    Best for couples who like their own space to spread out or share a bed with children/pets.

    Shop King 
  • Outline icon of a cal king bed

    Cal King

    83.5" L x 72" W

    Best for taller people, people who share the foot of their bed with pets, or have a narrow bedroom.

    Shop Cal King 
Size Guide
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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  • Serta sheep holding up a sign with a house and moon on it to indicate Serta's 120 night trial.

    120-day trial

    If you’re not completely satisfied, you can exchange or return it for a refund.

    Details 
  • Serta sheep holding up a sign with a delivery truck on it to indicate Serta's free shipping and returns.

    Free shipping and returns

    All products ship free and feature free returns when you order directly from Serta.com.

    Details 
  • Serta sheep holding up a sign with a bed on it to indicate Serta's white glove delivery.

    Optional white glove delivery

    Hand delivered and setup in the bedroom of your choice. Plus removal of your old one.

    Details 
  • Serta sheep holding up a sign with a warranty paper on it to indicate Serta's 10-year mattress warranty.

    10-year limited warranty

    You should be able to rely on the quality of your rest. That’s why every Serta® bed is backed by our hassle free warranty.

    Details 

  • Monthly financing with Affirm

    Quick, simple financing options with Affirm. Apply at checkout.

    Details