What is the Biggest Mattress You Could Buy?
Standard Mattress Sizes
Most people are familiar with traditional mattress sizes:
- Twin
- Full
- Queen
- King
- California King
While these sizes fit many needs, they may not provide enough space for large families, couples with different sleep habits, or those who simply want more room.
What Are Oversized Mattresses?
Oversized mattresses are larger than standard King or California King sizes. They are often custom-made to fit your bedroom and personal preferences, offering extra space and comfort.
Choosing an oversized mattress depends on:
- Available bedroom space
- Budget
- Comfort needs and sleep preferences
Oversized mattresses can be more expensive but may offer better support, especially for those with back pain or other sleep concerns.
The Largest Mattress Size: Alaskan King
The Alaskan King mattress is currently the largest mattress you can buy in 2026. It measures 108" by 108".
- Ideal for large families who co-sleep with children and pets
- Great for tall sleepers needing extra room
- Available only through specialty retailers
- Typically more expensive than standard mattresses
Other Oversized Mattress Options
- Wyoming King Mattress: Measures 84" x 84". Wyoming king mattresses are the second-largest oversized option, almost as wide as Texas king mattresses and easier to fit in most master bedrooms.
- Alberta King Mattress: Measures 96" x 96". The Alberta king is 10 inches wider and four inches shorter than the Wyoming king, making it suitable for smaller spaces.
- California King Mattress: Measures 76" x 80". A California King is 10 inches shorter and 8 inches narrower than an Alaskan King, making it a good choice for those who want a large mattress but have limited space.
How to Create a Larger Sleep Surface
If you want an oversized mattress but are looking for a more economical solution, consider joining two smaller mattresses together. For example, combining a Twin XL and a Queen mattress can create a super king-sized surface. This setup offers the same length as an Alaskan King but is narrower, and can be a cost-effective alternative.
Considerations Before Purchasing an Oversized Mattress
- Measure your bedroom to ensure the mattress will fit comfortably.
- Remember that accessories like sheets and foundations may need to be custom ordered.
- Oversized mattresses are often made to order, so plan for longer delivery times.
Many companies selling oversized mattresses in 2026 offer custom-built foundations and accessories to match your purchase.
Frequently Asked Questions
What is the biggest mattress available in 2026?
The Alaskan King mattress is the largest standard oversized mattress available, measuring 108 inches by 108 inches.
Where can I buy an oversized mattress?
Oversized mattresses like the Alaskan King, Wyoming King, and Alberta King are typically available through specialty mattress retailers and custom bedding companies.
How much space do I need for an Alaskan King mattress?
You will need a large bedroom—at least 12 feet by 12 feet is recommended—to comfortably fit an Alaskan King mattress and allow space for movement and furniture.
Can I combine two mattresses to make a larger bed?
Yes, joining two smaller mattresses, such as a Twin XL and a Queen, can create a larger sleep surface similar to an oversized mattress, often at a lower cost.
Are accessories for oversized mattresses easy to find?
Sheets, foundations, and bed frames for oversized mattresses usually need to be custom ordered, as standard bedding will not fit these larger sizes.
