Serta Cromwell Firm Queen-size Mattress and Box Spring Set

by Serta
Today: $474.99
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ITEM# 11927335
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ITEM#: 11927335

Sleep in comfort on this firm queen-size mattress set by Serta. This Cromwell Firm mattress features antimicrobial fibers to help reduce asthma and allergy triggers.

  • Bedroom furniture features antimicrobial fibers to help reduce asthma and allergy triggers
  • Set includes: Sertapedic firm mattress, box spring
  • Ideal for those who like a firmer feel to the bed
  • Soft resilient fiber provides a plush surface that breathes away heat and moisture
  • Layers of high density support foams provide enhanced firmness to the sleep set
  • Double-tempered hour-glass steel coil design provides lasting support to the body
  • Serta's heavy-gauge steel border rod provides enhanced edge support and a firm seating edge
  • Mattress set meets all federally-mandated flammability standards with Serta's patented FireBlocker system

  • Mattress set: 18 inches high x 60 inches wide x 79 inches long
  • Mattress: 9 inches high x 60 inches wide x 79 inches long
  • Foundation: 9 inches high x 60 inches wide x 79 inches long

White glove home deliveries require a 4-hour window to complete delivery; this includes delivery of the mattress, set-up in the room of your choice, removal of all packaging and debris and removal of your old mattress upon request. Please note that there is no surcharge for additional flights of stairs. You will be contacted by the home delivery agent when the product is ready for delivery (typically 1 to 3 weeks), we recommend requesting product removal at the same time you schedule your home delivery appointment.

Fabric color, pattern and quilt stitching may vary.

30-Day Comfort Guarantee - If you are not satisfied with your purchase within 30 days, you may return your order for a refund less a re-stocking fee. After 30 days, the mattress cannot be returned.


Mattress Type Innerspring
Thickness 9 Inch
Support Firm
Mattress Top Tight Top
Size Queen
Dimensions 18x58x78
Warranty 10 year Limited Manufacturer
Model Number 575971-850
Country of Origin United States

Customer Reviews

5 Stars
4 Stars
3 Stars
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1 Stars
  • Most Recent

  • Buy
    Verified Purchase

    Great set at a great price!

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  • Serra Cromwell firm Queensize mattress/box spring
    Verified Purchase

    Bad bed and mattress. Had to return

    Read More
  • Great beginner mattress for new homeowner
    Verified Purchase

    Great beginner mattress for new homeowner

    Read More
  • Where's the firmness?
    Verified Purchase

    This set was great for the first week, as the weeks progressed it became less supportive; two years later I feel as though I'm sinking. There's no support, especially where I need it the most. Being 5'7"and 150 lbs I didn't think I'd literally put a dent in it, but I did.

    Read More
  • wonderful mattress
    Verified Purchase

    have had this for a few years and it is still amazing

    Read More
  • Most Helpful

  • great bed for the value
    Verified Purchase

    i was very skeptical about ordering a bed online without trying it out first, but after extensive research, i decided to order this bed. i was really impressed by the quality of customer service and by how prompt the delivery service was. i received my bed after 10 days of placing the order and i am completely happy with my purchase. so far, this bed is a good balance of soft and firm so that when i sleep on my side, my shoulders do not hurt. this is definitely a great bed for the price.

    Read More
  • excellent purchase
    Verified Purchase

    i was in sore need of a new bed. after shopping around stores, i wasn't really satisfied with the pricing i found. i was extremely worried about purchasing a bed without testing it out. after reading all 25 reviews, it appeared that only people who do not like firm beds had complaints. i am a runner and have lower back issues. at first, i was worried that i would be unhappy, it took me about 2 weeks to break in the bed. i am so happy i took a chance, this was my best overstock purchase ever! this bed is extremely comfortable for me. it only took about 1 week to receive my bed, i received plenty of updates/phone calls on the status of my order, and they even hauled away my old bed. i would recommend this bed to anyone who likes a firm bed!

    Read More
  • A good buy
    Verified Purchase

    I purchased the Serta Firm Queen Mattress. Overall I'm very happy with my purchase. I was debating on getting the softer one, but after reading the reviews for that some people said it was too soft. I figured if this bed was too hard, then I could buy a mattress topper. It did take some getting used to but I am now getting a good night's sleep almost every night. The delivery guys were great and brought it up the stairs for me and took the plastic off of it. The only downside is that you can't flip the mattress over. I knew that when I bought it from reading the other reviews but decided to buy it anyway because of the low cost and $1 shipping. Overall a great buy!!

    Read More
  • Excellent
    Verified Purchase

    This is an excellent product, firm just like we wanted. And having it shipped directly to us and packed up the stairs was really a bonus. I shop overstock for all my large items now.

    Read More
  • Serta mattress
    Verified Purchase

    My husband and I could not wait to get our shipment, we contacted Overstcok customer service every week on the phone or live chat since we would not able to track the status on our order online. The mattress is a full queen size 60x80 which was our main concern since one of the review said that it was 1 inch short all around, 58x78. But when we got the shipment on Mon, Dec. 7th, morning in the rain. we inspected the mattress and box spring and got out the measuring tape and measured it twice to make sure it is a full 60x80. If not, we might have returned it. But my husband and I love our new bed. My husband thinks it was manufatured the day we ordered the mattress according to the label on the mattress which is made in Moreno Valley, CA. Maybe that's why it took some time to arrive. This bed is higher than our old bed which was over 10 years old.

    Read More

Questions & Answers

  • Q:

    "Does the box spring only come as one piece, or can I get a side by side? A queen sized box spring would not fit up my stairs."

    • A:

      this wil fit easily in any space

    • A:

      Hello brzielinski, This comes with the standard box spring as a set. You would not be able to get a side by side. The dimensions are 9 inches high x 60 inches wide x 79 inches long.

    Read more Read less
  • Q:

    "Is there a guarantee that the mattress that I get is unused - not something that has been returned?"

    • A:

      Mine was brand new with tags and wrapped in heavy plastic.

    • A:

      Thank you for your question. All of our mattresses are non returnable, and we guarantee you will receive a new never used mattress.

    Read more Read less
  • Q:

    "How thick is the box spring and will the set work on a platform bed?"

    • A:

      Mattress set: 18 inches high x 60 inches wide x 79 inches long Mattress: 9 inches high x 60 inches wide x 79 inches long Foundation: 9 inches high x 60 inches wide x 79 inches long

  • Q:

    "is this a one sided mattress?"

    Read more Read less
  • Q:

    "is this a two sided mattress that I can flip?"

    Read more Read less
  • Q:

    "Where is this mattress/box spring made?"

  • Q:

    "Does the wood come with the bed? Do you need to buy a frame?"

    • A:

      This is a box spring and mattress set, there is no wood involved here.

  • Q:

    "Is it possible to buy the mattress without the box spring?"

  • Q:

    "what is the gauge number, or thickness of the springs?"

  • Q:

    "what is the coil count?"

  • Q:

    "How do I add white glove service and is there an extra cost?"

    • A:

      Please contact customer service for further assistance

    • A:

      White glove delivery is included. No extra cost.

    Read more Read less
  • Q:

    "Does this boxsrping come"

    • A:

      This is a mattress set, so yes, the item comes with both a mattress and a box spring.

  • Q:

    "What is the 'comfort level' rating for this mattress? I need a 4.5-6.5. Also your reviews won't show up; it just keeps me on this page when I click on 'reviews'."

  • Q:

    "Is the matresss separate from the box spring ? In picture, looks like both are stitched together."

  • Q:

    "white glove service with this item?"

Shopping Tips & Inspiration

Shipping & Returns

Contact Information
1-4 week delivery after the item ships:**

Delivered by freight carrier. See Oversized Item Delivery Policy.

Mattress Return Policy:

Mattress Sets are non-returnable upon signature at delivery. Mattresses are non-returnable if opened or taken out of their plastic wrapping.
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This item cannot be shipped to Alaska or Hawaii. More details

Oversized Item Delivery Policy:

This item will be shipped via freight carrier to your home, excluding rural routes, remote areas not in close proximity to areas commonly serviced by freight carriers, islands, APO/FPO addresses, P.O. Boxes, Alaska and Hawaii. Please provide your daytime and evening phone numbers during check out so our carrier can contact you to schedule delivery. Refer to our Oversized Item Delivery Policy for additional information.
More details

For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.