Illustration of a bunk bed with a visible mattress being measured with a tape measure, emphasizing the dimensions.

What Size is a Bunk Bed Mattress?

Bunk beds, including standard bunk beds and loft beds, are a popular choice for kids' rooms and small spaces, offering versatile sleep spaces in a single furniture piece. But when it comes time to buy a bunk bed mattress, many people wonder - what size mattress do you need? From standard twin sizes to safety considerations, this article will cover everything you need to know about bunk bed mattress sizes.

Popularity of Bunk Beds

Bunk beds offer a fun and space-saving sleeping solution for kids and adults. Recent surveys show that over 30% of households with children under age 12 have bunk beds. As tiny home living gains popularity, bunks allow adults to comfortably sleep two people in a compact room., with 5 convenient store locations, provides bunk bed mattresses in all needed sizes.

Standard Mattress Sizes for Bunk Beds

When selecting a mattress for your bunk, whether it's a bottom bunk or a top one, you’ll need to choose from standard bed mattress sizes:

  • Twin - Twin bunk bed mattresses measure 38” x 75” and are the most common bunk bed size. They work for all bunk bed frames.
  • Twin XL - For taller sleepers, the twin extra-long (XL) measures 38” x 80”.
  • Full - Measuring 54” x 75”, full bunk bed mattresses fit some bunks but may be tight.
  • Queen and King - Wider queen and king sizes typically don’t fit most bunk bed frames.

Mattress Size



38” x 75”

Twin XL

38” x 80”


54” x 75”

Bunk Bed Shapes and Mattress Fit

Bunk beds now come in various shapes and styles, including the space-efficient loft bed design.. The mattress you choose must align with the bunk bed frame:

  • Standard bunk - Traditional bunk with one bed stacked over the other. Fits twin/full mattresses.
  • L-shaped bunk - Beds form an L-shape, allowing different mattress sizes on each side.
  • Futon bunk - Lower bed has a futon couch folding into a mattress. Often uses full size.

Common bunk bed shapes determine mattress sizes

Comfort and Support Specs

Beyond standard sizes, also consider these features for a foam mattress or a latex mattress naturally designed for bunk beds:

Thickness - Very thin mattresses won’t provide enough cushioning. Look for at least 6 inches thick, with 8 - 10 inches ideal for most sleepers.

Core materials - Various inner mattress materials impact comfort and support:

  • Innerspring coils
  • Memory foam
  • Latex foam

Weight capacity - Ensure your mattress matches the bunk bed’s designed weight limits for safety.

Top Bunk Mattress Safety

Since bunk beds lift sleepers up high, using proper safety precautions is critical - especially for children. Be sure your bunk bed mattress checks these boxes:

  • Meets all local safety standards
  • Fits the frame without wide gaps
  • Has integrated railings on both sides
  • Includes a ladder or stairs with handrails
  • Non-slip steps and surfaces

Following bunk bed safety best practices reduces the risk of falls and injuries. For loft and top bunks, ensure the mattress fits snugly for maximum safety.

Shopping for Bunk Mattresses

Wondering where to shop for foam mattresses or a latex mattress for your bunk bed? Here are some top options:

  • - Our 5 store locations across Canada offer twin, twin XL and full bunk mattresses fitting standard bunk frames. You can also conveniently shop our selection online.
  • Other online retailers - Many eCommerce sites sell bunk bed mattresses with home delivery. Check delivery fees and return policies first.
  • Mattress stores - Nearby mattress showrooms sometimes stock twin and other sizes to fit bunk beds. Ask about trial periods.

In-store, you can personally test mattresses. When ordering a bunk bed mattress online:

  • Carefully measure your bunk bed first
  • Read mattress specs to confirm size, height and materials
  • Review return policies, especially for comfort
  • Factor in any shipping/delivery costs

Caring for Your Bunk Mattress

Once you select the ideal bunk bed mattress, be sure to care for your investment:

  • Rotate regularly - Rotate the mattress head-to-toe every 2-3 months to prevent dips from forming.
  • Use a mattress topper (optional) - Adding a 1-3 inch memory foam or other mattress topper can boost comfort. Check it fits the bunk first.
  • Protect with a mattress protector - Waterproof mattress protector shields against spills and stains.
  • Clean as needed - Wipe down bunk bed frames regularly. Spot clean the mattress itself with mild soap and water.

Proper mattress care makes your bunk bed comfy for years.

Frequently Asked Bunk Mattress Questions

Here are answers to some other common questions about selecting an ideal bunk bed mattress:

Do bunk bed mattresses have special sizes?

  • No, bunk mattresses use the standard twin, twin XL or full mattress sizes to match corresponding bunk bed frames.

What about thickness - how thick should my bunk mattress be?

  • Choose a bunk mattress between 6 and 10 inches thick. Under 6 inches lacks cushioning for most people. Over 10 inches may be too tall to fit the bunk properly.

Can you put any mattress on a bunk bed?

  • You need to choose a mattress in the right size for your specific bunk bed frame. Pay attention to the mattress height too, ensuring it is not too tall or wide to fit the bunk bed properly.

Is a softer or firmer bunk mattress better?

  • Comfort is subjective to each sleeper. In general, kids often prefer softer mattresses for more cushioning, while supportive firmness helps alleviate pressure points for some adults. Test different firmness levels to determine your own preference.

Key Takeaways

  • Standard mattress sizes for bunk beds are twin, twin XL and full sizes. Wider queen and king sized mattresses usually don’t fit bunk frames.
  • Consider mattress thickness around 8 - 10 inches for adequate comfort and support.
  • Carefully check that your chosen mattress dimensions match your specific bunk bed frame.
  • Follow all bunk bed safety guidelines, especially guard rails, to prevent falls.
  • offers convenient online and in-store bunk bed mattress shopping.
Knowing the right bunk bed mattress size sets the foundation for safe, restful and long-lasting comfort. Now you can shop confidently for your ideal bunk bed sleeping solution.

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