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When you’re buying, moving, or storing a mattress, it can be helpful to know the correct mattress sizes in inches. Our mattress size chart & storage guide breaks down common bed size dimensions, which can be helpful whether you are purchasing a new bed or storing your mattress.
Why Mattress Size Matters (Especially for Storage)
Mattress sizing isn’t just about choosing the right fit for your bedroom. When it comes to storage, knowing your mattress dimensions determines how easily you can maneuver and protect your bed. Learning the measurements of your mattress will also help you:
Choose the Right Storage Unit: Depending on how you store them, large mattresses like the Cal. king require at least a 10’x10’ unit, while smaller twin XL or single sleepers fit well in a 5’x10’ unit.
Stack or Position Items Efficiently: Knowing the dimensions of your bed makes it easy to fit other items alongside it in your storage unit.
Prevent Bending or Structural Damage: Some mattresses, such as memory foam, should never be folded or bent.
Plan for the Right Accessories: Mattress bags, covers, moving straps, and tie-downs come in different sizes, which is why you need to know your bed dimensions.
Need to store multiple mattresses? Sounds cozy! Contact your local Storage Star, and we’ll help you choose the perfect fit.
Mattress Storage Compatibility Table
Use this table to help you organize your storage unit and pick the right size:
Mattress Size | 5'x5' Unit | 5'x10' Unit | 10'x10' Unit |
Twin | Horizontal: ✅ Vertical: ✅ Side: ✅ | Horizontal: ✅ Vertical: ✅ Side: ✅ | Horizontal: ✅ Vertical: ✅ Side: ✅ |
Twin XL | Horizontal: ❌ Vertical: ✅ Side: ✅ | Horizontal: ✅ Vertical: ✅ Side: ✅ | Horizontal: ✅ Vertical: ✅ Side: ✅ |
Full or Double | Horizontal: ❌ Vertical: ✅ Side: ❌ | Horizontal: ✅ Vertical: ✅ Side: ❌ | Horizontal: ✅ Vertical: ✅ Side: ✅ |
Queen | Horizontal: ❌ Vertical: ❌ Side: ❌ | Horizontal: ❌ Vertical: ✅ Side: ❌ | Horizontal: ✅ Vertical: ✅ Side: ✅ |
King | Horizontal: ❌ Vertical: ❌ Side: ❌ | Horizontal: ❌ Vertical: ✅ Side: ❌ | Horizontal: ✅ Vertical: ✅ Side: ✅ |
California King | Horizontal: ❌ Vertical: ❌ Side: ❌ | Horizontal: ❌ Vertical: ✅ Side: ❌ | Horizontal: ✅ Vertical: ✅ Side: ✅ |
Check out our storage unit size guide for help choosing the right storage unit for your mattress.
Mattress Size Chart
Here’s our dimensions guide for standard U.S. mattress sizes:
Oversized Mattress Dimensions
Not all mattresses are created equal, and the size you choose can affect which storage unit will work best. Here are some oversized mattress dimensions:
Mattress Name | Dimensions | Notes / Features |
California King | 72 × 84 | Narrower and longer than standard King; good for tall sleepers |
Texas King | 80 × 98 | Very large; rarely used; may require custom bedding |
Alaskan King | 108 × 108 | Largest standard mattress size; usually custom; fills a whole room |
Wyoming King | 84 × 84 | Square-shaped; rare; very heavy |
Cattleman King | 84 × 90 | Designed for luxury spaces; uncommon |
Split King | 76 × 80 | Two Twin XL mattresses side by side; which is ideal for adjustable beds and adjustable bases |
Queensize XL / Olympic Queen | 66 × 80 | Slightly wider than standard Queen; rare |
RV Mattress Sizes Chart
RV mattresses come in several custom sizes to fit compact sleeping spaces. Use this chart to compare and plan for RV storage.
RV Mattress Type | Dimensions (W × L in inches) |
Twin / Single | 28–38 × 75 |
Twin XL (RV) | 28–38 × 80 |
Full / Double | 53–54 × 75 |
Short Queen | 60 × 75 |
Queen | 60 × 80 |
RV King | 72 × 80 |
California King | 72 × 84 |
Custom / Irregular | Variable |
Bunk Bed / Short Twin | 28–32 × 74 |
Many Storage Star facilities have enough space to accommodate storing an RV in an indoor storage unit, outdoor covered parking, or outdoor parking storage. Find a local Storage Star near you to get started.
How to Measure Your Mattress
If you need to replace or store an existing mattress and you aren’t sure what size it is, the easiest solution is to measure it. Here are some simple steps to obtain accurate measurements of your mattress:
Lay the mattress flat on a hard, even surface
Measure the length from head to foot
Measure the width from side to side
Measure the height or thickness
Check the tag or label for the manufacturer’s dimensions
Write the measurements down so you can remember them when it’s time to choose the right storage unit or mattress bag
Accurate measurements prevent the frustration of buying the wrong size storage accessories.
Choosing the Right Storage Unit for Your Mattress
If you need to put your mattress in a storage unit, you need to know the dimensions. For example, the size of queen mattresses makes them relatively easy to store in most units that are 5’x10’ or larger. Smaller sizes, like a twin or twin XL mattress, can fit on their side or vertically in a 5’x5’ storage unit. Other mattresses and bed accessories that can fit into a 5’x10’ unit include:
Twin size
Twin XL
Full
Queen
Small bed frames
Boxes
Side tables
On the other hand, California king beds require a 10’x10’ unit or larger, due to the extra length. A 10’x10’ unit or larger is ideal for:
Standard kings
Thick hybrid or pillow-top mattresses
Dressers
Bed frames
Large boxes
Seasonal items
If you can, put your mattress in a protective bag and store it flat. If you store it vertically, you’ll need to secure it to the wall of the storage unit or put firm objects against it to prevent it from tilting. Climate-controlled storage is strongly recommended, especially if you are going to have the mattress there long-term.
Storage Star offers climate-controlled units in a variety of sizes — perfect for keeping your mattress fresh and protected.
How to Properly Store a Mattress
Before you put your mattress in a storage locker, make sure you:
Clean and dry it thoroughly
Use a mattress bag
Store flat when possible
Elevate it off the ground
Avoid stacking heavy items on it
Air it out after storage
Taking these precautions ensures your mattress stays in excellent condition, even if you have it locked in storage for months.
Common Mattress Storage Mistakes to Avoid
Whether you have an Olympic queen-size mattress, a standard twin, or something else, remember that there are right and wrong ways to store your bed. Here are some mistakes to look out for:
Folding or bending memory foam
Storing without a bag or cover
Leaving the mattress in a non-climate-controlled unit
Forgetting to elevate the mattress
Not cleaning the mattress before storing it
Avoid these mistakes so you can keep your mattress in great condition.
Why Store Your Mattress With Storage Star?
Storage Star offers reliable, flexible storage solutions designed to keep your mattress safe, clean, and in great condition. Benefits of storing your mattress or full-size bed at Storage Star include:
A wide variety of units to fit the most popular mattress sizes
Climate-controlled units
24/7 digital security
Easy online rentals and account management
Optional storage insurance for extra peace of mind
Use this mattress size chart to find the right fit, then reserve your storage unit online with Storage Star today.
Stash Your Mattress at Storage Star
Our mattress size chart will help you make informed decisions when buying, moving, or storing beds. Knowing these dimensions and the recommended room size for larger mattresses means your bed will be the ideal fit for your space. When you need a place to store your new mattress or new bed, Storage Star has got you covered.
Are you ready to store your mattresses? Find a Storage Star location near you and reserve your unit online today.
FAQs
How do I know what size mattress I have?
The easiest way is to check the manufacturer’s tag. It should include the exact dimensions of your mattress, including the thickness. Remember, the thickness can vary from one brand or style to the next, even if the length and width are the same.
You can always double-check the dimensions by measuring your mattress yourself. Just be mindful of any warps or bends so you can get accurate measurements.
Can you store a mattress on its side?
Yes, you can store an innerspring mattress on its side short-term. However, you shouldn’t do so long-term. Memory foam and hybrid mattresses should never be stored on their sides, as they will bend and lose shape over time. Storing your mattress flat is always the best choice.
How long can I store a mattress in a storage unit?
If you prepare your mattress properly, you can store it for months or even a few years. Make sure you clean it beforehand, use a mattress protector, and use a climate-controlled storage locker. Otherwise, it is at risk of mold and mildew.
Is it safe to store adjustable bed frames in a storage unit?
Yes. Adjustable bed frames can be safely stored upright or disassembled in a climate-controlled storage unit to prevent damage.
Can I store my mattress during a home renovation?
Absolutely! Store mattresses from guest rooms or master bedrooms flat in a clean, dry space or upright in a protective mattress bag to keep them safe.
Do I need climate-controlled storage for my mattress?
Climate-controlled storage is highly recommended, especially if you are storing your mattress long-term. Foam, fabric, and internal materials can absorb moisture and break down if temperatures are always fluctuating.
What’s the size of a queen mattress in inches?
A queen-size bed has a mattress that measures 60 inches wide by 80 inches long. It’s the most popular mattress size in the U.S. and fits comfortably in most bedrooms and storage units. A queen mattress will fit in a 5’x10’ storage unit with room for some small furniture or boxes. However, it’s not the best mattress for taller individuals.
What’s the difference between a king and a California king mattress?
A California king is 72”x84”, which makes it 4” longer and 4” narrower than a king-size bed, which is 76”x80”. The king is better if you want more width, while the California king provides more legroom for tall sleepers.
What’s the difference between a full-size mattress and a double bed?
There’s no difference. A full-size mattress is the same as a double bed, measuring about 54″ wide by 75″ long.
