Semi-Truck Mattress Sizes: Fitment Chart & Buying Guide

29th Oct 2026

Looking for the right sized semi truck mattress?

Every long-haul trucker should prioritize spending a sizeable portion of their budget on a quality mattress and driver's seat.

That's where you spend the majority of your time. So, the right size and material quality matters.

Here's a quick fitment guide breakdown.

Common Semi Truck Mattress Sizes

32" x 79" – Narrow Sleeper Mattresses: A space-saving option for compact sleeper berths and select upper bunks. Provides less room to move around while sleeping.

36" x 76" – Shorter Sleeper Mattresses: Offers four inches more width than a 32-inch mattress, with a shorter length suited to sleeper cabs with limited front-to-back space.

36" x 80" – Standard Sleeper Mattresses: A common replacement size offering 80 inches of length for taller drivers without taking up as much cabin space as wider mattresses.

38" x 80" – Wide Sleeper Mattresses: Provides extra shoulder and hip room. Found in select Peterbilt, Kenworth, Freightliner, and Volvo sleeper configurations.

42" x 80" – Extra-Wide Sleeper Mattresses: Offers six inches more width than a 36-inch mattress. Suited to larger sleeper berths, including select Peterbilt Unibilt, Kenworth Studio Sleeper, and Freightliner configurations.

Mattress Thickness

Matress thickness or height options range from 4 to 12-inches.

There are 12-inch thick mattresses that offer more absorption for heavier drivers, and thinner 6-inch thick gel-foam mattresses for more headroom and situp space, but with less travel room for heavy-set drivers.

Peterbilt Mattress Fitment Chart

Model & Sleeper Configuration	Mattress Size (W × L)
Unibilt, 36-inch Sleeper	32 × 70 or 36 × 80 in.
Unibilt, 48-inch Sleeper	32 × 70 or 36 × 80 in.
Unibilt, 63-inch Sleeper	38 × 80 in.
Unibilt, 70-inch Sleeper	42 × 80 in.
Unibilt Ultra Sleeper, Lower Bunk	51 × 75 in.
Unibilt Ultra Sleeper, Upper Bunk	32 × 80 in.
379, Traditional Sleeper	36 × 80 or 38 × 80 in.
389, Traditional Sleeper	36 × 80 or 42 × 80 in.
389, Larger Sleeper Configurations	42 × 80 in.
387 / 587, Mid-Roof	32 × 79 or 32 × 80 in.
387 / 587, High-Roof	42 × 80 in.
567, Standard Sleeper	36 × 80 in.
567, Large Sleeper	42 × 80 in.
579, Standard and Smaller Sleepers	36 × 80 or 38 × 80 in.
579, Larger UltraLoft Sleeper	42 × 80 in.
579, Upper Bunk	32 × 80 in.
589, Large High-Roof Sleeper	42 × 80 in.

Fitment Note: Peterbilt mattress dimensions can vary by sleeper size, bunk position, model year, factory interior package, and previous sleeper modifications. Measure the existing mattress and bunk platform before ordering.

Kenworth Mattress Fitment Chart

Model & Sleeper Configuration	Mattress Size (W × L)
W900, 72-inch AeroCab / Aerodyne	42 × 80 in.
W900, 86-inch Studio Sleeper	42 × 80 in.
W900, Other Conventional Sleepers	36 × 80 or 39 × 80 in.
W900 Studio, Upper Bunk	32 × 80 in.
T600 / T660, Traditional Sleepers	36 × 80 in.
T660, Large Sleeper	42 × 80 in.
T800, Traditional Sleeper	36 × 80 or 42 × 80 in.
T2000	38 × 80 in.
T680, 52-inch Mid-Roof, Standard Lower	32-inch width Length unverified
T680, 52-inch Mid-Roof, Optional Lower	38-inch width Length unverified
T680, 52-inch Mid-Roof, Optional Upper	28-inch width Length unverified
T680, 76-inch High-Roof / Mid-Roof	38 × 80 or 42 × 80 in.
T880, 40-inch Sleeper	36 × 80 in.
T880, 76-inch Sleeper	42 × 80 in.
W990, Large Sleeper	42 × 80 in.

Fitment Note: Sleeper mattresses can vary by model year, bunk position, sleeper package, and previous interior modifications. Measure the existing mattress platform before ordering, especially where only the mattress width has been verified.

International Mattress Fitment Chart

Model & Sleeper Configuration	Mattress Size (W × L)
Pro Sleeper, General Listing	35 × 79 or 36 × 80 in.
ProStar / ProStar+, 56-inch Sleeper	36 × 80 in.
ProStar+, 73-inch Sleeper, Lower Bunk	42 × 80 in.
ProStar+, 73-inch Sleeper, Upper Bunk	33.2 × 80 in.
LoneStar, Premium Sleeper Pull-Down Bed	42-inch width Length unverified
LoneStar, Replacement Standard	42 × 80 in.
LT Series, 56-inch Sleeper	36 × 80 in.
LT Series, 73-inch Sleeper, Lower Bunk	42 × 80 in.
LT Series, 73-inch Sleeper, Upper Bunk	33.2 × 80 in.
9900i, 51-inch Low Roof	36 × 80 in.
9900i, 51-inch Hi-Rise	36 × 80 in.
9900i, 72-inch Hi-Rise	36 × 80 in.
9900i, Sky-Rise, Lower Bunk	37 × 80 in.
9900i, Sky-Rise, Upper Bunk	30 × 86 in.
DuraStar 4300 / 4400	No verified factory sleeper mattress size

Fitment Note: Mattress dimensions can vary by sleeper package, bunk position, model year, and previous interior modifications. Measure the existing bunk platform before ordering, especially for configurations where only the mattress width has been verified.

Freightliner Mattress Fitment Chart

Model & Sleeper Configuration	Mattress Size (W × L)
Cascadia, OEM-Documented Sleeper	40 × 80 in.
Cascadia, 48-inch & 60-inch Sleepers	36 × 80 in.
Cascadia, Selected Sleeper Packages	39 × 80 in.
Cascadia, Wider Sleeper Packages	42 × 80 in.
Cascadia, 72-inch Large Sleeper	38 × 80 or 39 × 80 in.
Cascadia, Upper Bunk	32 × 80 in.
Columbia, Various Sleepers	32 × 80 or 36 × 80 in.
Columbia 112, Selected Mid-Roof	38 × 80 in.
Century Class	39 × 80 in. 38 × 80 replacement option
Coronado, Selected Sleepers	32 × 80 in.
Coronado, Other Sleeper Configurations	38 × 80 in.
Condo Couch Series	42 × 80 in.
FLD / Classic	36 × 80 in.

Fitment Note: Freightliner mattress dimensions can vary by sleeper height, bunk position, model year, interior package, and prior sleeper modifications. Measure the existing mattress and bunk platform before ordering, especially when multiple replacement sizes are listed for the same model.

Volvo Mattress Fitment Chart

Model	Sleeper Configuration	Mattress Size (W × L)
Volvo W Series	Standard Sleeper	36 × 80 in.
Volvo 610	Standard Sleeper	35 × 79 or 36 × 76 in.
Volvo 880	Large Sleeper	38 × 80, 42 × 80, or 36 × 76 in.
VNL 300	Day Cab	No sleeper mattress
VNL 400 / 430	42-inch Sleeper	35 × 79, 36 × 80, or 36 × 75 in.
VNL 440	42-inch Mid-Roof	35-inch width Length unverified
VNL 630	Mid-Roof Sleeper	35 × 79 or 36 × 80 in.
VNL 640	62-inch Mid-Roof	39-inch width Length unverified
VNL 660	62-inch Full-Height	Multiple bunk options Full measurements unverified
VNL 670	Mid-Roof Sleeper	35 × 79 or 36 × 80 in.
VNL 730 / 770 / 780	High-Roof Sleepers	38 × 80 in.
VNL 740 / 760	70-inch Sleeper	39 × 81 in.
VNL 840	74-inch Mid-Roof	Exact dimensions unverified
VNL 860	74-inch / 77-inch Sleeper (2017–2021+)	42 × 79 in.

Fitment Note: Volvo sleeper mattress dimensions can vary by model year, sleeper generation, bunk position, interior package, and prior modifications. Measure the existing mattress and bunk platform before ordering, especially where only the mattress width or sleeper configuration has been verified.

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29th Oct 2026