What Is the Biggest Size of Bed? Complete Guide to Oversized Beds

The Biggest Bed Size Available

The biggest standard bed size is the Alaskan King, measuring 108 inches by 108 inches (9 feet by 9 feet). This massive square bed provides 11,664 square inches of sleeping space—nearly three times the surface area of a standard King bed. For families who co-sleep with children or pets, or anyone who simply wants maximum sleeping space, the Alaskan King represents the ultimate in bedroom luxury.

While the Alaskan King is the largest widely recognized size, several other oversized options exist, including the Texas King (80x98 inches), Wyoming King (84x84 inches), and Alberta King (96x96 inches). Custom beds can be manufactured even larger, though finding compatible bedding and fitting them through doorways becomes increasingly challenging beyond these dimensions.

Oversized Bed Dimensions Comparison

Understanding how oversized beds compare to standard sizes helps put their enormity into perspective. A standard King bed measures 76x80 inches, providing 6,080 square inches of space, while a California King offers 72x84 inches (6,048 square inches).

The progression from standard King to Alaskan King represents a 92% increase in sleeping surface. This dramatic difference means an Alaskan King can comfortably accommodate two adults plus three children, or provide luxurious space for couples who want maximum personal space.

Room Size Requirements for Oversized Beds

Installing a massive bed requires careful consideration of room dimensions. Interior designers recommend leaving at least 24-30 inches of walking space on each side of the bed and at the foot for comfortable movement and furniture access.

Minimum Room Dimensions

• Texas King (80x98"): Minimum room size of 13x15 feet (195 sq ft)
• Wyoming King (84x84"): Minimum room size of 14x14 feet (196 sq ft)
• Alberta King (96x96"): Minimum room size of 15x15 feet (225 sq ft)
• Alaskan King (108x108"): Minimum room size of 16.5x16.5 feet (272 sq ft)

These calculations assume you'll want to include nightstands, dressers, or other bedroom furniture. For an Alaskan King in a room with additional furniture pieces, a bedroom of at least 18x18 feet (324 square feet) is ideal. This provides comfortable circulation space and prevents the room from feeling cramped despite the bed's enormous footprint.

Ceiling height also matters for visual proportion. Standard 8-foot ceilings work adequately, but 9-10 foot ceilings create better aesthetic balance with such large furniture pieces and prevent the room from feeling oppressively low.

Cost Considerations for Oversized Beds

Purchasing the largest bed sizes involves significant investment beyond the initial mattress and frame cost. The entire ecosystem of bedding becomes more expensive and harder to source.

Mattress Pricing

Oversized mattresses are typically custom-made or produced by specialty manufacturers:

• Texas King mattress: $2,000-$5,000
• Wyoming King mattress: $2,500-$5,500
• Alberta King mattress: $3,000-$6,500
• Alaskan King mattress: $3,500-$8,000+

Bedding and Accessories

Custom bedding significantly increases ongoing costs. An Alaskan King sheet set typically ranges from $300-$800, compared to $50-$200 for standard King sheets. Comforters and duvets for these sizes run $400-$1,500, as they require substantially more fabric and often must be custom-sewn.

Additional cost factors include:

• Bed frames or foundations: $1,000-$4,000
• Mattress protectors: $150-$400
• Blankets and throws: $200-$600
• Delivery and setup fees: $200-$500

Practical Challenges of the Biggest Beds

Beyond cost and space requirements, oversized beds present several logistical challenges that buyers should consider before investing.

Delivery and Installation

Standard doorways measure 30-36 inches wide, while hallways typically run 36-48 inches. An Alaskan King mattress at 108 inches cannot fit through any standard doorway in one piece. Most manufacturers design these mattresses to split into two or three sections that zip or button together, adding complexity to setup.

Staircases present even greater obstacles. If your bedroom is on an upper floor, professional delivery teams may need to hoist the mattress through a window using external lifting equipment, adding $300-$800 to delivery costs. Some homes simply cannot accommodate these mattresses without significant modifications.

Making the Bed

Changing sheets on a 108x108-inch bed is a two-person job. The center of the bed can be 4.5 feet from the edge, making it physically impossible to reach across and tuck fitted sheets from one side. Plan on spending 15-20 minutes changing bedding, compared to 5-10 minutes for a standard King.

Limited Resale Value

The market for used oversized mattresses is extremely limited. If you relocate or decide to downsize, selling an Alaskan King or Alberta King can be nearly impossible. Most buyers end up donating or disposing of these mattresses rather than finding a secondary buyer, representing a total loss of the initial investment.

Who Actually Needs the Biggest Bed Sizes

While massive beds appeal to many people's fantasies of luxury, certain situations genuinely benefit from these extreme dimensions.

Co-Sleeping Families

Families practicing extended co-sleeping with multiple children find oversized beds practical rather than extravagant. An Alaskan King provides approximately 36 inches of width per person for a family of three (two parents and one child), or comfortable space for two parents and two smaller children. This arrangement supports attachment parenting practices while ensuring everyone gets adequate sleep.

Individuals with Mobility or Health Issues

People with conditions like sleep apnea, chronic pain, or mobility limitations often share beds with medical equipment, therapy devices, or service animals. The extra space of a Texas King or Wyoming King (80-84 inches wide) allows room for CPAP machines, positioning pillows, and assistance devices without crowding the sleeping partners.

Pet Owners

Households with large dogs or multiple pets that sleep on the bed appreciate oversized dimensions. A Great Dane can occupy 30-40 inches of bed width when sprawled out. For couples with two large dogs, an Alberta King or Alaskan King prevents the nightly battle for space and improves sleep quality for all parties.

Luxury Hotel Suites

High-end resorts and boutique hotels install oversized beds as distinctive amenities. The novelty of an Alaskan King becomes a marketing feature that commands premium room rates. Hospitality businesses benefit because professional laundry services can handle custom bedding, and the beds remain in place permanently, avoiding resale concerns.

Alternatives to Oversized Single Mattresses

For those seeking maximum sleeping space without the challenges of custom mattresses, several alternative configurations offer practical benefits.

Two King Mattresses Side-by-Side

Placing two standard King mattresses (76x80") adjacent creates a 152x80-inch sleeping surface (12,160 square inches)—larger than an Alaskan King. This approach offers significant advantages:

• Standard bedding remains widely available and affordable
• Each sleeper can choose their preferred mattress firmness
• Mattresses fit through standard doorways
• Easier to replace or relocate

The main drawback is the seam down the middle, though mattress connectors and bridge pads minimize this gap effectively.

Custom Mattress Configurations

Some manufacturers create true custom sizes beyond even the Alaskan King. Sizes like 120x120 inches or 144x84 inches have been commissioned for celebrity homes and luxury estates. However, these one-off creations cost $10,000-$25,000+ for the mattress alone, with bedding requiring custom tailoring at similar premium prices.

Where to Buy the Largest Bed Sizes

Oversized mattresses aren't available at typical furniture retailers. Specialized manufacturers and custom bedding companies serve this niche market.

Specialty Mattress Manufacturers

Several US-based companies focus on oversized bed production:

• Ace Mattress: Offers Wyoming, Alberta, and Alaskan King sizes with custom foam or hybrid constructions
• Custom Comfort Mattress: Produces Texas through Alaskan Kings with various material options
• Innovative Mattress Solutions: Specializes in split configurations for easier delivery

Lead times typically run 4-8 weeks for custom mattress orders, as they're made-to-order rather than stocked inventory.

Bedding Sources

Finding sheets and bedding requires patience and research. Online retailers like Southshore Fine Linens, Custom Bed Linens, and Oversize Bedding specialize in hard-to-find sizes. Expect 2-6 week production times for custom sheet sets and comforters.

Some owners opt for flat sheets exclusively, using queen or king-size flat sheets as fitted sheets by tucking and securing with sheet straps. This workaround provides more readily available options, though with less secure fit.

Making the Decision: Is Bigger Actually Better

The appeal of maximum sleeping space must be weighed against practical realities. For most households, a standard King or California King provides sufficient space at a fraction of the cost and hassle.

Consider upgrading to oversized beds if you answer yes to multiple questions:

1. Do you have a bedroom larger than 250 square feet?
2. Will three or more individuals regularly sleep in the bed?
3. Can you budget $5,000-$10,000+ for the complete bed setup?
4. Are you planning to stay in this home long-term (5+ years)?
5. Does your home allow mattress delivery via wide doorways or window access?

If your primary goal is reducing partner disturbance during sleep, research shows that mattress quality and motion isolation matter more than size alone. A premium King mattress with excellent motion transfer prevention often outperforms a cheaper oversized mattress for sleep quality.

The Alaskan King at 108x108 inches stands as the pinnacle of commercially available bed sizes, offering unmatched space for those with specific needs and the resources to accommodate it. For the majority of sleepers, however, the sweet spot lies in the more practical Texas or Wyoming King sizes, which provide significant space upgrades while remaining somewhat more manageable in cost, bedding availability, and household integration.