- 108 × 108inches
- 274 × 274centimeters
- 81 sq ft7.53 m²
- 4 adults27 in each*
- +92%vs. a King
- 14 × 11.5 ftmin. room*
*Our calculation. Room size allows 30 in (76 cm) of walking space on both sides and at the foot.
2 models, each with its measurements
Alaskan King Mattress
An Alaskan King mattress measures 108 × 108 in (274 × 274 cm): a 9 × 9 ft square with 81 sq ft of sleeping space, 92% more than a King. Every mattress below is built to order in this exact size and ships free to the contiguous US.
Shop 2 models Will it fit my room?
| Mattress | 108 × 108 in 274 × 274 cm |
|---|---|
| Price | from $4,389 2 models |
| Delivery | free 48 contiguous states + DC |
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Mattress · Made to orderAlaskan King Firm Foam Mattress
$4,389Free delivery -
Mattress · Made to orderAlaskan King Latex Mattress
$5,189Free delivery
How to choose an Alaskan King mattress
- Comfort and build. Each product page lists the layers, the total height and the firmness exactly as the maker publishes them. If a detail is not published, the page says so.
- Height, then sheets. A fitted sheet needs a pocket deeper than the mattress plus any topper. Check the pocket depth on any sheet listing before you buy.
- The support underneath. A 108 × 108 in mattress needs a frame or platform built for the size. See the Alaskan King bed frames.
- How it arrives. Our 9 ft mattresses are delivered folded in half, in a box a carrier can handle. Each product page says how it ships and how long it takes to make.
- Returns. Oversized mattresses are made for your order. What can be returned, and when, is written on each product page and in our refund policy before you pay.
Our Alaskan King mattresses side by side
| Model | Price | Height | Firmness | Inside |
|---|---|---|---|---|
| Firm foam | $4,389 | 11 in | Firm | 2 in comfort foam over a foam support base |
| Latex | $5,189 | 12 in | Soft, Medium or Firm | 2 in comfort foam, 2 in natural latex, foam support base |
Both are made in one piece in the USA, ship in 1 to 3 weeks and travel folded in half in a box. Prices include shipping to the contiguous US.
Will an Alaskan King fit in your bedroom?
By our calculation, with 30 in of walking space on both sides and at the foot, an Alaskan King needs a room of at least 14 × 11.5 ft (4.3 × 3.5 m). The mattress itself is 108 in wide, so measure the headboard wall first. The mattress travels folded in half in a box; the frame comes in several boxes, listed on each frame's page.
| Size | Inches (W × L) | Centimeters | Surface | vs. King | Min. room* |
|---|---|---|---|---|---|
| King (Eastern King) | 76 × 80 in | 193 × 203 cm | 42.2 sq ft (3.92 m²) | — | 11.3 × 9.2 ft |
| California King | 72 × 84 in | 183 × 213 cm | 42 sq ft (3.9 m²) | -1% | 11 × 9.5 ft |
| Wyoming King | 84 × 84 in | 213 × 213 cm | 49 sq ft (4.55 m²) | +16% | 12 × 9.5 ft |
| Alberta King | 96 × 96 in | 244 × 244 cm | 64 sq ft (5.95 m²) | +52% | 13 × 10.5 ft |
| Alaskan King | 108 × 108 in | 274 × 274 cm | 81 sq ft (7.53 m²) | +92% | 14 × 11.5 ft |
*Minimum room = bed plus 30 in (76 cm) of walking space on both sides and at the foot. Our calculation, not a manufacturer figure.
What an Alaskan King mattress costs
Across the US makers we track, 108 × 108 in mattresses were listed from $3,300 to $11,000 on October 5, 2026. Our prices are shown on each mattress above, shipping included. A complete bed (mattress, frame and bedding) is broken down on the Alaskan King bed price page.
Alaskan King, or a smaller size?
The 108 × 108 in square is the biggest standard-named mattress. If your room is under about 14 ft on the headboard wall, look at our Wyoming King mattresses (84 × 84 in) or our Alberta King mattress (96 × 96 in, from $3,939; the size explained: Alberta King bed). If the wall is long enough but the room is not deep, our Florida King mattress keeps the 108 in width at King length, 80 in, and the Family Bed (120 × 80 in) is as short and wider still. Every size side by side: bed size chart.
Alaskan King mattress: your questions answered
What size is an Alaskan King mattress?
108 × 108 in (274 × 274 cm), a 9 × 9 ft square with 81 sq ft of surface. Some makers also sell shorter versions under the same name, such as 108 × 84 in, so check the inches on the listing: every mattress on this page is the full 108 × 108 in.
How much does an Alaskan King mattress cost?
Across the US makers we track, 108 × 108 in mattresses were listed from $3,300 to $11,000 on October 5, 2026. Our prices are shown on this page and include shipping to the contiguous US.
How is an Alaskan King mattress delivered?
In a box a normal carrier can handle: the mattress travels folded in half and opens up on your frame. Each product page states how that mattress ships, how long it takes to make, and we email the tracking number when it leaves the workshop.
What kind of frame does an Alaskan King mattress need?
One built for 108 × 108 in. One US maker notes that sizes this large
may require custom or reinforced support systems. A King frame is 76 in wide: 32 in too narrow.
Is an Alaskan King mattress worth it over a King?
It gives four sleepers 27 in of width each against 19 in on a King, and 92% more surface, but it needs a room of at least 14 × 11.5 ft and every piece of bedding has to be bought in 108 × 108 in.
Do King sheets fit an Alaskan King mattress?
No. King sheets are made for 76 × 80 in: 32 in too narrow and 28 in too short. You need sheets cut for 108 × 108 in, with a pocket deeper than the mattress height.