Truck drivers spend more time in their sleeper than most people spend in their beds at home. Comfort is not a luxury. It is the difference between waking up rested or waking up drained before your workday even starts. The problem is simple. Every truck interior is different. Mattress sizes are not universal and guessing the size usually leads to a bad fit.
This guide walks you through the most common truck mattress sizes and gives you a simple way to measure your sleeper so you always get the perfect fit.
Common Truck Mattress Sizes
Truck mattresses follow their own sizing rather than standard home sizes. Below are the measurements used across most major brands.
28 x 75
This is one of the most common sizes for compact sleepers and day cabs. It fits many Freightliner and older Kenworth models.
32 x 79
This is a popular mid-size mattress used in many modern sleeper cabs. It offers more room without taking up valuable space in the berth.
35 x 79
This size is often found in premium sleepers like high-roof or condo-style cabs. Many Peterbilt and Kenworth models use this size.
42 x 80
This is the widest standard truck mattress size. It is found in trucks with extended sleepers or custom interiors.
39 x 80
This is a tall driver favorite. It offers excellent legroom while fitting many International and Volvo sleepers.
If your truck is custom or older, your mattress size might fall between these. That is exactly why measuring matters.
How to Measure Your Truck Sleeper Correctly
Getting the right size is simple as long as you measure the correct way. Follow this step-by-step process to avoid mistakes.
Step 1. Remove your old mattress
Take the existing mattress out of the sleeper. Many truck mattresses have rounded corners or compressed edges from years of use. Measuring the old mattress often leads to an incorrect size.
Step 2. Measure the platform width
Use a tape measure and measure from the left inside edge of the sleeper platform to the right inside edge. Write down the exact number in inches.
Step 3. Measure the platform length
Start at the head of the sleeper and measure straight to the foot wall. Again, write down the exact number. If the foot end curves upward, measure to the point where the mattress actually sits.
Step 4. Check for cutouts or corners
Some trucks have curves, shelves, or built-in storage at the head or foot. Note these features so your mattress can be sized to fit around them.
Step 5. Measure the height clearance
Lift the upper bunk if your truck has a two-bunk setup. Make sure the new mattress will not hit the upper bunk when the lower bunk is in the raised position.
This simple process ensures you order the right size every time.
Why a Proper Fit Matters
A mattress that is too small shifts during the night and creates pressure points. A mattress that is too large bunches up and prevents the sleeper platform from closing or locking. The perfect fit protects your back, keeps you in proper alignment, and makes the cab feel more like a real bedroom.
Get the Perfect Fit With Rested Hauler
Every Rested Hauler mattress is engineered for the demands of the road. We build each size with premium foam, durable textiles, and a supportive core designed to handle long-haul use.
If your truck has a unique sleeper layout, we can help you choose the correct size or build one that matches your exact measurements.
Better rest means better driving. Better driving means a better life on the road.