Trundle Bed Size – Ideal Size For Optimal Sleep Comfort

In the realm of space-saving furniture, trundle beds have emerged as a popular choice for many households. Their unique design allows for an additional bed to be stored underneath the primary one, making them perfect for guest rooms or homes with limited space. However, when it comes to the trundle bed size, you have a lot of choices from twin, twin XL, full, Queen, to King varieties. 

This article will give you comprehensive guidance on the sizes of the trundles. We also recommend some options for more consultation. Estimating the dimensions of the mattress, frame, sheet, and floor space also plays a vital role in finding the right size.

Let’s read on to discover! 

What Is A Trundle Bed? 

A trundle bed has two parts: a typical bed frame and a lower bed on rolling wheels. Whenever you need more sleeping space, you can pull out the lower bed. Otherwise, this bed can slide beneath the bigger one. 

The product is an all-in-one option. This feature allows it to accommodate more people while still saving a lot of floor space.  


The trundles are available in different sizes and styles to serve different needs. 

  • Roll-out: This model is the standard, containing a bed with a mattress that can roll on casters.
  • Pull-out: The mattress of this model stays on a metal frame. However, it can’t handle as much weight as the roll-out.
  • Pop-up: The pop-up trundle bed has a structure that is as high as the parent bed.
  • Bunk bed: The bunk beds come with three mattresses because there is a drawer under the lower bed. 
  • Captain: Some of these versions have both mattresses and storage drawers.  

There are many types to choose from


Most trundle bed frames on the market today come from metal, wood, or a combination of both. Wooden frames are more durable and visually beautiful, but they are also the most costly option.

Metal frames give a clean, contemporary look. They’re also often reasonably priced.

You could also come across some low-cost plastic products. These options give less strength and are less robust than metal or wood ones. 

Trundle Bed Sizes 

Measuring the size of trundles is not a simple task. You have to check the dimensions of the mattresses, frames, sheets, and floor space. 


The trundle bed mattresses should be the most crucial factor to check. You need to determine the thickness, length, and width that fit the trundle bed frame.


Regarding thickness and size, trundle bed mattresses have certain limits. They have to stay beneath the parent bed. As a result, a mattress that fits the dimensions of the trundle is often thinner than a standard mattress.

You’ll need to know the height of the parent bed and the height of the trundle structure to figure out the right cushion thickness. 

For example, if the parent bed is about 10 inches tall while the trundle frame is only 5 inches tall, there’ll only be enough room for a 7-inch thick mattress. 

For trundle beds, the average mattress thickness is somewhere between 6 and 8 inches. It makes the mattress more comfortable and prevents it from getting stuck. 

Well-reviewed 38 x 74 x 4 mattresses that may also work RVs are available. They are thinner mattresses compared to the typical ones. 

The average thickness is somewhere between 6 and 8 inches

Width and length

Trundle beds are generally shorter than the parent bed. It’s worth noting that some materials, like memory foam, stretch less than their maturity and hence accommodate both trundle and standard bed frames.

Here are trundle bed mattress sizes: 

  • Twin mattress

The dimensions of the trundle bed mattress are 39 x 75 inches. A twin mattress can suit only one person. 

The trundle bed mattress size for one individual will be 1 inch narrower or shorter.

  • Twin XL mattress

A Twin XL option is 5 inches longer than a twin mattress and shares the same width. It’s suitable for taller occupants. 

Make sure the parent’s bed frame comes in a twin XL size as well. A twin XL cushion can’t fit in a twin frame. 

  • Full-size mattress 

A full-size mattress is the same as a double-sized bed. It has a width of 54 inches and a length of 75 inches. It can accommodate two adults but is quite nice for only one. 

Moreover, the counterpart will most likely be one inch narrower and shorter.

  • Queen 

The measurements of a standard Queen size bedding are 60 x 80. You may find it hard to come across a trundle bed mattress of this size. 

Often, there are some models to support the full-sized or twin trundle beds. 

If you want your kid to share a room with you, this option offers the perfect size. Make sure your room has enough space for both trundle and parent beds, as well as enough space to draw out the lower one. 

  • King 

The king-size is the combination of two twin XL sizes coming together. 

Finding a King frame for trundles is not easy. If you really want this size, you may think about purchasing a twin XL structure with a pop-up stand. 

The trundle mattresses come in different dimensions 

We have made a size chart table to find the correct dimensions for trundle mattresses easier.

Twin39  x 75 x 6-1438  x 75 x 6-8
Twin XL39’  x 80 x 6-1438 x 80 x 6-8
Full54’  x 75 x 6-1453 x 75 x 6-8
Queen60  x 80 x 6-14Hard to find, so they often have full or twin size
King78’  x 80 x 6-14Hard to find, so they often have full or twin size


For superior support for the trundle bed mattress, bed frames are available in a variety of sizes, forms, materials, and heights.

The frame of a trundle is usually smaller than that of a standard one for the trundle to fit underneath the parent bed’s construction. 

Trundle beds usually come in Twin and Full sizes. Twin XL dimensions are uncommon. Meanwhile, Queen or King frames are pretty tricky to see.

The sizes for twin mattresses are typically 38 inches in width and 75 inches in length, with 39 x 75-inch frames.

The measurements for most full-sized models are 53 x 75, with 54 x 75 frames.

The typical frame height is 7 to 9 inches, whereas that figure of a trundle bed mattress is 6 to 8 inches.


Tailored and plain sheets are the two kinds of sheets that may fit if adequately measured.

The elastic edges of a tailored sheet allow it to fit nicely around the mattress. The sheets will fall off as you sleep if the mattress is too thick for the sheet to cover. As a result, they will make you uncomfortable.

To avoid this issue, determine precisely what size mattress the trundles demand by measuring them beforehand. 

Sheet’s measurements inform you about the pocket depth, width, and length. The thickness of the pocket should match the height of the trundle bed mattress. 

The sheets should cover the mattresses nicely 

Regular pocket sheets can suit trundle mattresses with a height of 12 inches. Deep versions, on the other hand, work for trundle beds with a greater depth.

  • Tailored sheet

If your purchase comes in a twin-size mattress, the tailored sheets should be the same size. 

In addition, the pocket depth is at least 2 to 3 inches more than the depth of the trundle bed mattress. 

  • Plain sheet

A plain sheet has rectangular edges that fold neatly and rest entirely on the end of the truckle. Its length and width are the main factors to consider. 

A twin plain sheet is around 70 x 100 inches, whereas a full-size one is roughly 85 x 100 inches. 

A queen-size sheet is 90 x 106 inches, while a king-size model is 108 x 106 inches.

Floor space

It’s crucial to think about where you want to put the truckle before you buy one.

When your room has little floor space, a truckle is an excellent option. Nevertheless, to feel at ease and set the perfect location for your trundle, you must consider the following factors:


You’ll need enough shelf space in your room to slide the lower bed in when not in use and out when you need more sleeping space.

The parent bed

Whenever the lower bed rests beneath the upper bed, the room’s sole available sleeping space is for the parent.

Pulled bed

We buy this product for more sleeping space. Hence, it would help if you indeed pulled out the lower bed. It will occupy some space on the floor. 

Walking space

You’ll need to have some walking space to go in and out of the bedroom from the entryway to the trundle. 

In addition, for a trundle bed mattress to be comfortable, it must have at least a 2-foot pathway around its edge.

It would be best to measure the width and length of the main bed to expect how much the trundle may take up. Then, estimate when pulling out the lower bed, and add 2 feet of space for the walkway. 

There are some factors to consider for the floor space 

Pros And Cons Of Trundle Beds 

These products are undoubtedly perfect for saving space. They come in different sizes for more choices. 

However, there is also room for improvement. Let’s check the pros and cons for a deeper understanding of the beds.  


  • A  truckle can save up space. Otherwise, you have to think about how to set up a new area for sleeping. 
  • Extra compartments and drawers are available in several trundle types, such as captain beds, for more storage.
  • Trundle beds are an excellent alternative for kid’s bedrooms, particularly during slumber parties and family events, in addition to guestrooms.
  • The price varies depending on the models. In most cases, you’ll spend less than two separate beds. 
  • There are many options in terms of types, sizes, designs, and materials. 


  • You’ll have to get the mattresses individually, which might be annoying if the trundle requires a custom-size cushion.
  • Although some versions are more durable than others, many trundles slide and make noise when someone climbs into the top bed. If someone else is sleeping, they may wake up.
  • The wheels of a trundle may degrade over time. As a result, you may find it extremely difficult to put in and draw out the trundle.

Trundles have both pros and cons

How To Buy A Trundle Bed? 

In addition to the dimensions and constructions, there are other important factors to consider when buying trundles. 

Let’s check carefully to make a wise decision.


Most trundle beds have castors. Hence, they’re simple to roll out on firm floors. On carpets, though, they will be a little harder to maneuver. 

You need to check whether the one you’re interested in features wheel locks, which prevent the truckle from slipping.

For living rooms or workplaces, trundles beneath daybeds are a terrific option.


Many trundles require assembly before use. Some models are pretty quick to set up within 30 minutes. However, this characteristic may not be accurate for all.

If you don’t want to waste too much time on assembly, pick the simple models. Also, avoid the ones with drawers. They are the most difficult to build. 

If you aren’t clever, you may always hire someone to put the bed together for you. Yet, make sure you are aware of the situation first.

You can learn more tips for assembling trundles via this video:


A truckle is generally not good for an additional sleeping area if you live in a humid region. 

The truckle sits beneath the parent bed for most of the time. As a result, the mattress has very limited ventilation. Bacteria can develop on it then. 

Some other factors contribute to a high-quality trundle bed

Notable Brands Known For Their Trundle Bed

These brands combine innovative design, quality materials, and excellent craftsmanship to ensure that their trundle beds meet the comfort and functionality needs of consumers.

  1. Baxton Studio: Renowned for its contemporary and stylish designs, Baxton Studio offers trundle beds that are both aesthetically pleasing and built for comfort.
  2. Pottery Barn: Known for its stylish and durable furniture, Pottery Barn offers a range of trundle beds, often made with solid wood and designed with aesthetics in mind.
  3. Atlantic Furniture: This brand is known for its eco-friendly, hardwood furniture, and its trundle beds are no exception. They combine durability with comfort.
  4. Wayfair: As one of the largest online furniture retailers, Wayfair carries a vast selection of trundle beds from various brands. Their offerings range from budget-friendly to high-end, ensuring options for every consumer.
  5. IKEA: The Swedish furniture giant offers minimalist and functional trundle bed designs, which are popular for their affordability and practicality.

Frequently Asked Questions 

Here are some of the most frequently asked questions about trundle beds and their sizes. We hope that you can benefit from the answers.

1. Can I use a truckle with any bed?

Yes, you may buy bed frames and trundles separately. On the other hand, the trundle frame must have adequate space between itself and the floor to accommodate the trundle underneath it.

Trundle beds typically can be as small as 6 inches in diameter. You must, though, take into account the mattress’s elevation. 

Some trundles are as thick as 10 inches. As a result, the space between the bed frame and the flooring should be around 16 inches.

2. Can I use trundle beds on the carpet?

Yes, a truckle may still work on the carpet. The carpet helps keep the mattress in its position, particularly if the trundle casters do not lock. 

However, on the carpet, pulling the trundle out is more complicated than on tile or wood. Some trundle beds feature grips to make transferring them simpler.

3. Can I sleep on a trundle bed all of the time?

Yes! Trundle beds are excellent for kids who share rooms with their siblings. To guarantee that you’re comfortable and adequately supported, invest in a high-quality pillow and mattress. 

Although mattresses have to be thin, they may nevertheless be supportive and promote good sleep.

4. How much does a trundle bed frame cost?

The cost of a trundle bed frame can range anywhere from $150 to $2,000. The cost depends on its kind and fabric. Typically, the higher the price, the more resources and time it takes to construct. 

If the trundle bed is a bunk bed, it will surely cost more than a standard twin-size one. 

Final Words

We have shared with you a complete guide to choosing the best trundle bed sizes for your needs. 

People buy these products because they want to save space while still feeling comfortable. As a result, it turns out to be terrible if you opt for the wrong size.

Hopefully, you will find this article helpful. If you need any further information to make your purchase, please feel free to ask. Thank you for reading!