Size Guide
2 models, each with its measurements

Wyoming King Mattress

A Wyoming King mattress is 84 × 84 in (213 × 213 cm), a 7 × 7 ft square with 16% more surface than a King. Of the oversized sizes, it is the one that needs the smallest room (our calculation). 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?

Wyoming King Mattress, at a glance
Mattress84 × 84 in 213 × 213 cm
Pricefrom $2,799 2 models
Deliveryfree 48 contiguous states + DC
Wyoming King Mattress
  • 84 × 84inches
  • 213 × 213centimeters
  • 49 sq ft4.55 m²
  • +16%vs. a King
  • 2 adults42 in each*
  • 12 × 9.5 ftmin. room*

*Our calculation. Room size allows 30 in (76 cm) of walking space on both sides and at the foot.

Wyoming King vs. the sizes either side

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.

Room planning, frames and bedding for this size are covered on the Wyoming King bed page.

Our Wyoming King mattresses side by side

Model Price Height Firmness Inside
Firm foam $2,799 11 in Firm 2 in comfort foam over a foam support base
Latex $3,459 12 in Soft, Medium or Firm 2 in comfort foam, 2 in natural latex, foam support base

Both are made to order in North Carolina and ship in 1 to 3 weeks. Prices include shipping to the contiguous US.

What to check before ordering

  • Comfort and build. Each product page lists the layers, the height and the firmness as the maker publishes them.
  • How it arrives. An 84 × 84 in mattress travels compressed and rolled, or folded, in a box a carrier can handle. Each page says how it ships and how long it takes to make.
  • The support underneath. A King frame is 76 in wide: too narrow. See the Wyoming King bed frames.
  • Sheets. King and California King sheets are both too narrow. You need sets made for 84 × 84 in.
  • Returns. What can be returned, and when, is written on each product page and in our refund policy.

What a Wyoming King mattress costs

Across the US makers we track, 84 × 84 in mattresses were listed from $2,100 to $7,500 on October 5, 2026, against $3,300 for the cheapest Alaskan King: the Wyoming King is the least expensive way to leave a standard King behind. Our prices are on this page, shipping included.

Is a Wyoming King enough, or do you need an Alaskan King?

Two adults get 42 in each on a Wyoming King, three sleepers 28 in each (our calculation). If four people will regularly share the bed, the Alaskan King mattress (108 × 108 in) gives 27 in each. If the room is the constraint, the Wyoming King needs about 12 × 9.5 ft against 14 × 11.5 ft.

Wyoming King mattress: your questions answered

What size is a Wyoming King mattress?
84 × 84 in (213 × 213 cm), a 7 × 7 ft square with 49 sq ft of surface, 16% more than a standard King.
How much does a Wyoming King mattress cost?
Across the US makers we track, 84 × 84 in mattresses were listed from $2,100 to $7,500 on October 5, 2026. Our prices are on this page and include shipping to the contiguous US.
Will a Wyoming King mattress fit through a door?
Yes when it is delivered rolled or folded in its box, which is how the mattresses on this page ship. Each product page gives the delivery format.
What frame does a Wyoming King mattress need?
One built for 84 × 84 in: a King frame is 76 in wide and too narrow, and a California King frame is 72 in wide.
Wyoming King or Alaskan King mattress?
The Wyoming King gives two adults 42 in each and needs a room of about 12 × 9.5 ft; the Alaskan King gives four sleepers 27 in each and needs about 14 × 11.5 ft.