If you’re shopping for a new bed, you might be wondering, what’s the biggest size mattress available today? The answer is the Alaskan King, but choosing the right oversized mattress involves more than just knowing the name.
You need to consider room dimensions, delivery logistics, and your personal sleep needs. This guide will walk you through every large mattress size, from common to colossal, to help you make the perfect choice for your space.
What’s The Biggest Size Mattress
The absolute largest standard mattress size you can buy is the Alaskan King. It measures a massive 108 inches wide by 108 inches long. That’s 9 feet by 9 feet, providing an enormous 9,184 square inches of sleep surface.
It’s designed to comfortably sleep four adults or a family with young children. However, it’s extremely rare, custom-made, and requires a very large bedroom and special bedding orders.
Standard Large Mattress Sizes
Before we look at specialty giants, let’s review the common large sizes that are widely available.
- King (Standard King/Eastern King): 76″ W x 80″ L. The most popular oversized mattress. It’s ideal for couples who want plenty of personal space or for parents with kids or pets who join them.
- California King: 72″ W x 84″ L. Slightly narrower but longer than a standard King. It’s the best choice for taller individuals over 6’4″ who need the extra legroom.
- Queen: 60″ W x 80″ L. Considered a medium-large size, it’s perfect for single sleepers who love space or couples in smaller master bedrooms.
Specialty & Custom “Biggest” Mattresses
Beyond standard kings, the world of custom bedding offers even larger options. These are not typically found in stores and come with unique challenges.
Alaskan King (108″ x 108″)
As the reigning champion, the Alaskan King is a true square. It offers unparalleled space but has significant drawbacks.
- Requires a bedroom at least 14′ x 14′ to feel balanced.
- Sheets, mattress protectors, and bed frames are custom-order only.
- Getting it up a staircase or through a standard doorway is often impossible; it may require crane delivery through a window.
Wyoming King (84″ x 84″)
A more manageable giant, the Wyoming King is 7 feet by 7 feet. It provides more width than a California King and more length than a standard King, offering a great compromise for families.
Texas King (80″ x 98″)
This size prioritizes length over extreme width. At over 8 feet long, it’s fantastic for very tall basketball players or anyone who hates their feet hanging off the edge.
How to Choose the Right Large Mattress for You
Bigger isn’t always better. Selecting the right size is a practical decision. Follow these steps to ensure you choose wisely.
Step 1: Measure Your Room
This is the most critical step. Your mattress needs to fit comfortably with room to walk around.
- Measure the full length and width of your bedroom.
- Subtract the mattress dimensions, and aim for at least 2-3 feet of walking space on each side and at the foot of the bed.
- Remember to account for other furniture like dressers, nightstands, and benches.
Step 2: Consider Access and Delivery
Can the mattress physically get into your home? Measure hallways, staircases, and door frames. Tight corners can be a major obstacle. Many companies that sell oversized mattresses have detailed access guides and may offer “white glove” delivery service for an extra fee.
Step 3: Think About Your Household
Who will be using the bed every night?
- Couples: A Standard King is usually perfect. If one partner is much taller, consider a Cal King.
- Families: Young children who co-sleep may benefit from a Wyoming or Alaskan King, but a Standard King is often sufficient.
- Single Sleepers: A Queen or King offers luxurious space to spread out.
Step 4: Budget for Everything
The mattress cost is just the beginning. Oversized mattresses, frames, and bedding all come at a premium.
- Custom-sized mattresses can cost two to three times more than a standard King.
- Sheets for an Alaskan King can be very expensive and have limited style choices.
- You’ll likely need a custom or specially reinforced bed frame or platform.
The Practicalities of Owning a Giant Mattress
Life with a massive bed is different. Here’s what you should be prepared for.
Finding Bedding and Frames
Regular stores won’t carry what you need. You’ll be shopping at specialty online retailers or working with custom sewing services for sheets and duvet covers. For frames, look for companies that specialize in large sizes or consider a custom-built platform.
Moving and Cleaning
Rotating or moving a mattress that weighs several hundred pounds is a major task. You’ll likely need help. Vacuuming the surface is easy, but spot cleaning becomes more important because taking it outside for a deep clean isn’t an option.
Room Layout and Climate Control
A giant mattress can dominate a room’s layout and even affect air circulation. Ensure your HVAC system can comfortablely handle the space, and think about how you’ll arrange other furniture around the bed’s focal point.
Common Alternatives to a Giant Mattress
If a specialty size seems to daunting, there are smart alternatives that can provide similar benefits.
Two XL Twins = One Standard King
Pushing two XL Twin mattresses (38″ x 80″ each) together creates a 76″ x 80″ sleeping surface identical to a King. This allows for personalized firmness on each side and is easier to move.
Using a Bed Bridge
If you use two separate mattresses, a bed bridge is a foam insert that covers the gap in the middle, creating a seamless sleep surface.
Wall-to-Wall Custom Platform
Instead of one massive mattress, consider having a custom platform built that fills a nook or an entire wall. You can then use multiple standard mattress toppers or custom-cut foam to create a giant, seamless sleeping area. This is often more flexible and easier to maintain.
FAQ Section
What is the biggest mattress size you can buy?
The biggest standard mattress size is the Alaskan King, measuring 108 inches by 108 inches. It is a custom order and not available in regular mattress stores.
Is a California King bigger than a King?
It depends on what you mean by “bigger.” A California King is longer (84″ vs. 80″) but narrower (72″ vs. 76″) than a Standard King. So, it has more legroom but less overall width.
What is the largest common mattress size?
The largest commonly available mattress size is the Standard King (76″ x 80″). It is stocked by virtually every mattress retailer and has widely available bedding.
How big is a Wyoming King mattress?
A Wyoming King mattress is 84 inches wide by 84 inches long. That’s 7 feet by 7 feet, making it wider and longer than a Standard King but smaller than an Alaskan King.
Can you get sheets for an Alaskan King bed?
Yes, but you cannot buy them in stores. You must order them from custom bedding websites or services. They are significantly more expensive than standard sheet sets and come with limited fabric options.
Final Recommendations
For 99% of shoppers, a Standard King or California King will be the perfect “biggest” mattress. They offer ample space without the extreme logistical and financial challenges of a custom giant.
Always prioritize the measurements of your room and your access points before falling in love with a size. If you have a very large family or an exceptionally spacious bedroom, then researching a Wyoming or Alaskan King could be worthwhile. But for most, the journey for the perfect big bed ends happily with a standard King size.
Remember to test different mattress types (like memory foam or hybrid) in your chosen size, as support and feel can vary. Take your time with this decision—a mattress is a long-term investment in your sleep and health.