12″ Kingship Comfort Oversized King Mattress Firm · Brand walkthrough
kingship comfort oversized king mattress
Rest Right Mattress · YouTube ↗
1 / 1Images: Rest Right Mattress. Shown size and configuration may vary.
12″ Kingship Comfort Oversized King Mattress Firm
Best for: Giant beds in three pieces
A 12″ firm foam mattress in Alaskan, Texas, Alberta and family-bed sizes up to 144″ × 84″, built as three pieces you can move or replace one at a time.
Good to know: No returns once it ships, and the store doesn't say which number is width.
- Type
- Foam
- Height
- 12″
- Sizes
- Made to order + custom
- Certified
- CertiPUR-US
108 × 108 in · 12″ tall
Where to get it
- restrightmattress.comQueen $2,440 (sale, was $3,440) · checked Oct 18 Get a quote
Returns: None. Details
We may earn a commission if you buy. Check the price for your exact size and height on the seller’s site.
The short version
Worth a look if
- Giant beds in three pieces
Good
- A 12″ firm foam mattress in Alaskan, Texas, Alberta and family-bed sizes up to 144″ × 84″, built as three pieces you can move or replace one at a time.
- Trial: None. All mattress sales final; no returns or cancellation once shipped
- A buyer of the oversized family size said the price was far below other sellers and was happy with the quality and service.
- An Alaskan King buyer said shipping was quick and setup easy, and a Texas King buyer said it was worth the wait.
Think about
- No returns once it ships, and the store doesn't say which number is width.
Based on the maker’s published specs and terms, and the owner reviews linked below. We haven’t slept on it. Something wrong? Tell us.
What owners say
From reviews on the seller’s site A small set of real reviews, each linked to its source. Not a star rating.
Small sample · 3 owner reports
Only brand-hosted reviews were found: verified buyers on the product pages praise the price, the service and setup.
What people liked
What to weigh up
No substantive concern verified in this small sample. This is a gap in the evidence, not proof of no drawbacks.
Sources & sample limits
3 verified-owner reviews on the Firm and Medium product pages, 2024–2026 Sample: 3 owner reports.
All three reviews are hosted by Rest Right. No Reddit, Trustpilot or GoodBed reviews of Rest Right or Kingship Comfort were found.
Research checked October 14, 2026. These are sourced observations, not our own product tests or a star rating.
What owners report
Buyers on the maker's site ordered Texas King and family-size beds and say the quality and price beat other sellers, with patient help choosing size and firmness during long home builds.
Owners like
- Price versus other oversized sellers
- Help choosing size and firmness
From Rest Right Mattress product reviews (seller’s site). Summarized in our words.
Every size it comes in
Alaskan king108 × 108 in12″Texas king80 × 98 in12″Family Bed (144 × 84)144 × 84 inAs listedFamily Bed (120 × 80)120 × 80 inAs listedAlberta (96 × 96)96 × 96 inAs listedTexas King (98 × 80)98 × 80 inAs listedAlaskan King (108 × 80)108 × 80 inAs listedAlaskan King (108 × 84)108 × 84 inAs listed
Taken from the maker’s size options, in the inches it publishes. Tap a size to compare every mattress made in it. Sizes marked “as listed” don’t exactly match a standard size, so check your frame.
Price for every size
From the maker’s site on Oct 24, 2026. Prices change often, so check before you buy.
| Size | Inches | Price | |
|---|---|---|---|
| Texas King (98" x 80") | 98 × 80 | $2,000 sale | See it |
| Texas King (80" x 98") | 80 × 98 | $2,000 sale | See it |
| Alaskan King (108" x 80") | 108 × 80 | $2,340 sale | See it |
| Alaskan King (108" x 84") | 108 × 84 | $2,340 sale | See it |
| Alberta (96" x 96") | 96 × 96 | $2,300 sale | See it |
| Family Bed (120" x 80") | 120 × 80 | $2,630 sale | See it |
| Alaskan King (108" x 108") | 108 × 108 | $2,440 sale | See it |
| Family Bed (144" x 84") | 144 × 84 | $2,830 sale | See it |
Video reviews
12″ Kingship Comfort Oversized King Mattress Firm · Brand walkthrough
Testing Alaskan King, Texas King, Family Size Firm Mattress
Rest Right Mattress · YouTube ↗
12″ Kingship Comfort Oversized King Mattress Firm · Brand walkthrough
Alaskan, Texas, Wyoming King Bed Mattress-In The Factory
Rest Right Mattress · YouTube ↗
How it compares
Beside the most similar mattresses from other brands.
| 12″ Kingship Comfort Oversized King Mattress FirmRest Right Mattress | AS5Amerisleep | Classic Bamboo MattressCariloha | Resort Bamboo MattressCariloha | |
|---|---|---|---|---|
| Type | Foam | Memory foam | Memory foam | Memory foam |
| Queen price | $2,440 | $1,849 | $1,804 | $2,564 |
| Height | 12″ | 14″ | 11″ | 12″ |
| Trial | See terms | 100 nights | 100 nights | 100 nights |
| Odd sizes | 2 | None | None | None |
| Expert reviews | None yet | 4 | None yet | None yet |
What’s inside
- 12″ quilted cover
- 22″ graphene cooling foam
- 38″ high-density poly foam base
- Feel
- Firm
- Height
- 12″
- Custom sizes
- Yes, the maker builds to your measurements
Complete the bed
Odd sizes need everything else in the same inches. Here’s what we have for this mattress’s odd sizes.
Alaskan king · 108 × 108
Texas king · 80 × 98
Returns and ordering
Trial and returns
None. All mattress sales final; no returns or cancellation once shipped
Before you order
- Measure inside the frame, not the old mattress
- Check clearance above for the height you pick
- Make sure your base supports it
- Buy sheets in the same exact size
Questions
What is it made of?
12″ oversize foam mattress made to order in the USA as a three-piece design (the pieces can be moved separately or replaced later, and the comfort layer can be swapped instead of buying a new mattress). Graphene-infused cooling foam over a high-density poly foam base under a quilted cover; CertiPUR-US foam.
How firm is it?
Firm That’s the maker’s description; we haven’t measured it.
Which sizes and heights can I get?
8 sizes, 12″. See every size. Confirm your exact size and height with the seller.
Are the reviews about this exact mattress?
From reviews on the seller’s site. All three reviews are hosted by Rest Right. No Reddit, Trustpilot or GoodBed reviews of Rest Right or Kingship Comfort were found.
Where did this information come from?
- layer specs, three-piece design, 15-year warranty, size options, ships in about a week
- store data: size variations and prices
- three-piece design, custom size or height on request, top layer replaceable
Checked 2026-10-18. Specs and terms can change.
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