Vehicle Measurement Guide A simple step-by-step guide to accurately measuring the critical dimensions in any SUV or minivan. Step 1 of 10 10% STEP-BY-STEP MEASUREMENT GUIDE Grab a tape measure and head out to your car. This will only take a couple minutes. The A dimension is the length behind the last row of seats (measure behind the 2nd row if your vehicle has 3 rows of seats)."A" Measurement (behind 2nd row) = The B dimension is the wheel well width or narrowest part of your trunk."B" Measurement (wheelwell width) = The C dimension is the width between the 60-split back seats."C" Measurement (60-split seat width) = The D dimension is the length behind the first row of seats. This determines the maximum length the sleeping platform can extend in your vehicle. First push the 1st row seats forward all the way, then measure along the cargo floor from the back of the driver or passenger seat to the plastic trim at the trunk hatch."D" Measurement (Length behind 1st row) = The final dimension helps us understand how much of a bump we're dealing with so we can include the correct supports for your vehicle. For a video tutorial on how to measure the seat bump height, refer to the following video.Seat Bump Height = Suweeet! Let's get some vehicle infoYEARMAKEMODEL Rad! Almost finished. Please tell us about your vehicle's 2nd row seating arrangement: Does your vehicle have bench seats or captain seats in the 2nd row?My 2nd row seats are Bench Seats Captain Seats Other Woohoo! OK last question: Which of the images best depicts the way your 2nd row seats fold down?Fold Type Normal Sticks up Other Optional: Include Photos of your Trunk (max 3 photos) Drop files here or Select files Accepted file types: jpg, png, Max. file size: 500 MB. Tell us how to contact you, then press Submit.Name First Last Email