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Truck & RV Mattress Size Guide


Sleep Dog Mattress Size Guide


Size A: 36" x 80"
Size B: 39" x 80"
Size C: 42" x 80"
Size D (bunk): 32" x 80"
Queen: 60" x 80"
RV Queen: 60" x 75"
RV King: 72" x 75"

*Please note: When looking for a replacement mattress it is important to know the exact measurements of your sleeping area. While most sleeper cabins accommodate standard semi-truck mattress sizes, the best and most accurate way to measure for your new mattress is to measure the width and length of your sleeper berth.

While most semi trucks and RVs come stocked with a mattress, an OEM mattress does not usually maintain the quality, comfort or support of an aftermarket SleepDog® truck or RV mattress. Your mattress won’t come with an expiration date, but if you begin to experience poor sleep or have trouble falling asleep, it may be time for a mattress upgrade. When the time comes to buy a new truck mattress or RV mattress, there are a few things you will need to consider, such as rig size or RV size and budget. Below, we outline the dimensions for seven standard truck and RV mattress sizes that we offer at SleepDog®, along with some specific examples of various trucks or recreational vehicles each mattress size generally fits in, to make mattress shopping simpler for you:

  • Size A: 36" x 80"
  • Size B: 39" x 80"
  • Size C: 42" x 80"
  • Size D (bunk): 32" x 80"
  • Queen: 60" x 80"
  • RV Queen: 60" x 75"
  • RV King: 72" x 75"

Size A

36" x 80"

Our Size A truck mattress is one of our smaller mattress sizes, measuring 36” wide by 80” long. While the width of the Size A mattress measures 2 inches shorter than the width of a traditional Twin XL mattress, the length measures the same. This mattress size is ideal for single sleepers, and usually fits in the following truck configurations:

  • Peterbilt 579 sleeper cabin
  • Freightliner Cascadia models, including single or double bunk configuration
  • International Pro Star 56” Sleeper Configuration
  • Mack Pinnacle
  • International LT Series 56” Sleeper

Twin Mattress

Size B

39" x 80"

The Size B truck mattress measures 39” wide by 80” long, sharing the length of a standard twin XL bed while offering one additional inch of width. This extra inch of sleep space doesn’t sound like much, but it can make just enough difference in the comfort of your sleeper cabin. Size B SleepDog® mattresses are generally a great fit for these trucks models:

  • Some Freightliner Cascadia configurations
  • Volvo VNL 760 or 740 sleep configurations

Twin XL Mattress

Size C

42" x 80"

Size C mattresses are constructed to measure 42” wide by 80” long. The Size C mattress is built to maximize your comfort by giving you the most sleeping space out of our semi-truck specific mattress sizes (not including our Queen, RV Queen and RV King mattresses). Not quite as wide as a standard full mattress, but several inches wider than our Size B mattress size, Size C mattresses are most compatible with:

  • Some Freightliner Cascadia models
  • Most International Truck 73” sleeper cab configurations
  • Kenworth W990, W900 sleeper cabin options
  • Peterbilt 567 80” Sleeper Configuration
  • International Lonestar

Full Mattress

Size D (bunk)

32" x 80"

Our Size D mattress, also known as the bunk size, was designed to fit perfectly in cabins with upper bunk options. Still relatively new to the SleepDog® mattress collection, size D is only currently available in our BigDawg mattress™ construction, which is a 9” dual-sided memory foam mattress construction. Size D mattresses are often a great choice for these semi trucks:

  • Kenworth T680 sleeper cab with bunk
  • International LT Series 73” sleeper
  • Peterbilt 397 Mid Roof Configuration

Queen Mattress

Queen Size

60" x 80"

While a queen size mattress won’t likely fit into an over the road sleeper, we offer this option so you can enjoy the comfort of your SleepDog® mattress at home, too. A standard queen size mattress is the most popular mattress size on the market, measuring 60” wide by 80” long. The queen size offers plenty of space to accommodate couples, families or even singles who just enjoy the extra room to move around. Queen mattresses fit best in bedrooms that measure at least 10 feet x 10 feet, to leave enough space in your bedroom to get in and out of bed comfortably. Our queen size mattress is available in both the SleepDog® and BigDawg mattress™ options, to provide quality sleep that you already know and love.

King Mattress

RV Queen Size

60" x 75"

Our RV queen size mattress was developed to accommodate camper configurations, without sacrificing floor space or comfort. Available in both a 7” construction or a 9” construction, the RV queen measures slightly shorter than a traditional queen, so you can still enjoy the spacious sleep of a queen mattress, without interfering with your living space. Like a standard queen, this mattress would be perfect for a family get-away as it can accommodate multiple people. Our SleepDog® RV queen is a perfect fit for the following RVs:

  • Some Newmar Bay Star Sport configurations
  • Various Tiffin Open Road Allegro configurations

California King Mattress

RV King Size

72" x 75"

Similar to the RV queen, the RV king mattress was developed for slightly larger camper and RV floor plans, so you can bring great sleep on the road with you. The RV king is our largest mattress size currently available, measuring just 5” shorter than a standard king while maintaining the width of a California King. There are several benefits in investing in this mattress. The RV king is enough for a couple or even a small family to enjoy. Each person has enough room to move around and sleep in whatever position that best suits their needs. The RV king is a great choice for the following RVs:

  • Keystone Cougar configurations
  • Cruiser RV Radiance Travel Trailers
  • Palomino Puma 31FKRK

California King Mattress

Choosing Which Size is Best for You

Still not sure which mattress size will suit your needs? Then it’s time to grab a tape measure and measure your current mattress so you know exactly what size will work in your sleep space. We offer two different mattress constructions on our online store to ensure that we meet every sleep need, on and off the road. The BigDawg mattress™ - our most popular model - measures 9” in height and is constructed with memory foam infused with CoolRest® technology and topped with a quilted foam cover for extra comfort. Our SleepDog® mattress is 7” of medium-firm memory foam, also infused with CoolRest® technology. Both mattresses are made with CertiPUR-US® certified memory foam and are DOT approved. With free mattress delivery, a 120-night risk free sleep trial and a 10-year warranty with your purchase, getting better sleep has never been easier or better built for life on the road.