Mattresses
Low-Profile Mattresses for Bunk Beds, Loft Beds and Trundles
The right mattress has to match more than the bed size. For a bunk bed, loft bed or trundle, mattress height affects guardrail clearance, sleeping space and whether the mattress fits the frame as intended. Start with the mattress size and maximum thickness listed on your bed’s product page, label or instructions, then choose a mattress at or below that limit.
Shop 5-, 6-, 8- and 10-inch low-profile mattresses in Twin, Twin XL, Full, Queen and selected King sizes, plus deeper mattresses for compatible standard beds. Many of our bunk and loft bed pages already list recommended mattress thickness and matching mattress options.
- Match the sizeTwin, Twin XL, Full, Full XL, Queen and King are not interchangeable.
- Check the height limitNever exceed the bed manufacturer’s maximum recommended mattress thickness.
- Check each sleep surfaceTop, bottom and trundle positions can have different mattress requirements.
- Use the exact matchesLook for recommended mattresses on the bed product page or ask our furniture team.
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Sale
12 Inch Chime Elite 2.0 Mattress - Ashley Furniture
Was: $499.99 - $999.00Now: $304.99 - $634.99Stretch out and let the cares of the day fade away with this plush twin mattress. Explore mattresses from Ashley Furniture. It's crafted for modern comfort and convenience, with layers including...Was: $499.99 - $999.00Now: $304.99 - $634.99Qty in Cart: 0Quantity:Price:Was: $499.99 - $999.00Now: $304.99 - $634.99Subtotal: -
6 Inch South Bank Black Full Size Futon Mattress
Now: $445.00Our South Bank Black Full Size Futon Mattress can be used on a futon bunk bed or a futon sofa bed to give your guests a soft and comfortable place to sleep. This futon mattress has a black tufted...Now: $445.00 -
8 Inch Raelin Twin XL Memory Foam Mattress
Now: $865.00Our Raelin Twin XL Memory Foam Mattress is a great choice for kids, teens, or adults. It features a 6" high density foam base with a top layer of 2" visco memory foam. This durable material absorbs...Now: $865.00 -
Sale
10 Inch Oliver Memory Foam Mattress
Was: $325.00 - $625.00Now: $259.00 - $499.00FREE SHIPPING TODAY! Our Oliver Memory Foam Mattress is sure to give you a good nights rest. These mattresses memory foam have a 7" responsive foam base topped with 3" of gel infused memory foam...Was: $325.00 - $625.00Now: $259.00 - $499.00Qty in Cart: 0Quantity:Price:Was: $325.00 - $625.00Now: $259.00 - $499.00Subtotal: -
Sale
5 Inch Max Twin Memory Foam Mattress
Was: $455.00Now: $365.00Max Twin Memory Foam Mattress Our Max Twin Memory Foam Mattress features a top layer of gel infused cooling foam to keep you cool while still offering plush comfort. It is perforated to promote air...Was: $455.00Now: $365.00 -
6 Inch Gilette Full Size Futon Mattress
Now: $665.00FREE SHIPPING TODAY! Our Gilette Full Size Futon Mattress features 5" of high density foam covered with 2 layers of cotton batting. This futon mattress has a black cotton cover with an overall...Now: $665.00 -
Sale
8 Inch Rex Queen Memory Foam Mattress
Was: $815.00Now: $650.00Rex Queen Memory Foam Mattress Our Rex Queen Memory Foam Mattress is a great loft or bunk bed mattress and can also be used on our standard queen size beds as well. It features a high density foam...Was: $815.00Now: $650.00 -
15 Inch Luxe 2.0 Plush Mattress
Was: $788.22Now: $634.95Reap the benefits of restorative sleep with the plush feel of this Euro top queen mattress. Explore mattresses from Ashley Furniture. Layers of cushioned comfort, including memory foam, quilt foam...Was: $788.22Now: $634.95 -
Sale
6 Inch Knox Memory Foam King Mattress
Was: $535.00Now: $429.00FREE SHIPPING TODAY! Our newly upgraded Knox Memory Foam King Mattress offers an affordable and comfortable mattress solution. It features a 1.5” top layer of gel infused memory foam with ventilation...Was: $535.00Now: $429.00 -
Sale
6 Inch Morgan Twin XL Memory Foam Mattress
Was: $186.25Now: $149.00FREE SHIPPING TODAY! Our new Morgan Twin XL Memory Foam Mattress offers a memory foam mattress solution at an affordable price. The .75” top layer of memory foam relieves pressure points while the 5...Was: $186.25Now: $149.00 -
8 Inch Raelin Full Size Memory Foam Mattress
Now: $975.00Our Raelin Full Size Memory Foam Mattress is a great choice for teens, kids, or adults. It features a 6" high density foam base with a top layer of 2" visco memory foam. This durable material absorbs...Now: $975.00 -
8 Inch Raelin Queen Size Memory Foam Mattress
Now: $1,115.00Our Raelin Queen Size Memory Foam Mattress is a great choice for adults, teens and kids. It features a 6" high density foam base with a top layer of 2" visco memory foam. This durable material...Now: $1,115.00
How to Choose the Right Mattress for a Bunk Bed or Loft Bed
Mattress size tells you the required length and width. Mattress height—also called thickness, depth or profile—tells you how tall the mattress is. Both measurements matter on bunk beds, loft beds, daybeds and trundles. A mattress can have the correct width and length but still be too thick for the bed’s guardrails or available clearance.
Low-Profile Mattress Height Guide
| Mattress height | When to consider it | Sizes currently offered | Starting points |
|---|---|---|---|
| 5 inches | Very low-profile applications where guardrail or trundle clearance is tight. Confirm the bed’s exact size and minimum support requirements. | Twin, Twin XL and Full | Max Twin, Max Twin XL and Max Full |
| 6 inches | A common low-profile choice for compatible bunks and lofts, with dedicated trundle and futon options also available. | Twin, Twin XL, Full, Queen and King; selected trundle and futon sizes | Knox Twin, Morgan Twin XL, Knox Full and Knox Trundle |
| 8 inches | Use when the bed allows an 8-inch mattress. Always check whether the top and bottom bunks have different limits. | Twin, Twin XL, Full and Queen | James Bunk Bed Mattress, Bryant Twin XL and the Rex collection |
| 10 inches | For beds whose instructions permit a 10-inch profile. Do not assume it is suitable for an upper bunk. | Twin, Full, Queen and King | Oliver Memory Foam Mattress |
| 12 to 15 inches | Deeper mattresses for compatible standard beds. Use on a bunk or loft only when that exact profile is permitted by the bed manufacturer. | Twin through California King, depending on the model | 12 Inch Chime Elite 2.0 and 15 Inch Luxe 2.0 Plush |
Mattress Size Guide
These are common U.S. mattress dimensions. Individual products can vary slightly, so compare the dimensions on both the bed and mattress product pages before ordering.
| Size | Common width | Common length | Fit note |
|---|---|---|---|
| Twin | About 38 to 39 inches | About 75 inches | Common on kids’ bunks, lofts, daybeds and trundles. |
| Twin XL | About 38 to 39 inches | About 80 inches | Five inches longer than a standard Twin; the two are not interchangeable. |
| Full | About 53 to 54 inches | About 75 inches | Also called Double. Common on Full lofts and the lower level of Twin-over-Full bunks. |
| Full XL | About 53 to 54 inches | About 80 inches | Five inches longer than Full; use only with a Full XL frame. |
| Queen | About 60 inches | About 80 inches | Used on selected Queen lofts and Queen bunk configurations. |
| King | About 76 inches | About 80 inches | Primarily for compatible standard beds. |
| California King | About 72 inches | About 84 inches | Narrower and longer than standard King; the two are not interchangeable. |
Bunk, Loft and Trundle Mattress Fit Checklist
1. Start with the bed
Open the bed product page, label or assembly instructions. Record the required mattress size and the maximum mattress thickness for every sleep surface.
2. Treat each position separately
The top bunk, bottom bunk and trundle may use different sizes or height limits. A mattress that fits the lower bed may be too thick for the upper bunk.
3. Confirm the support system
Check whether slats, a bunkie board or another foundation is included or required. Do not add a box spring unless the bed manufacturer calls for one.
4. Compare exact dimensions
Review the mattress width, length and height instead of relying only on the size name. For a trundle, also confirm clearance beneath the main bed.
Common Mattress Fit Questions
What mattress height should I use on a bunk bed?
Use the maximum thickness stated by the bed manufacturer and choose a mattress at or below it. Many beds in our catalog list separate top- and bottom-bunk recommendations.
Can I use a 10-inch mattress on the top bunk?
Only if the bed’s product information, label or instructions permit that thickness. A mattress that is too tall reduces the amount of guardrail above the sleeping surface.
Do the top and bottom bunk need the same mattress?
Not always. Bunk configurations can use different sizes and different maximum heights. Match each position independently.
What mattress works in a trundle?
Match the trundle’s specified width, length and maximum depth. A standard-height mattress may prevent the trundle from closing beneath the bed.
Are Twin and Twin XL mattresses interchangeable?
No. They are commonly similar in width, but Twin XL is about five inches longer. Match the frame’s stated size.
Does a bunk bed need a box spring?
Many bunk and loft beds use built-in mattress supports and do not need a box spring. Follow the support requirements on the specific bed page or instructions.
