Our sleeping platforms have been meticulously tested in hundreds of vehicles to ensure a proper fit. Use the fit guide to verify your vehicle’s fit. Once verified, you can confidently place your order. We have 4 different size combinations that allow us to offer a precise one-size-fits-most fitment in your SUV, minivan, or pickup truck. Our sleeping platforms will fit snugly between your vehicle’s wheelwell arches without contacting them. This usually translates to a 1-3 inch gap on each side of the bed. Our sleeping platform widths closely mirror many of the common mattress sizes that you find online or at a local REI store.