The Jeep Grand Cherokee comes in a variety of bed sizes, depending on the model and trim level you choose. The base modelGrand Cherokee has a bed size of 60 inches wide by 34 inches long, while the top-of-the-line SRT8 model has a bed size of 72 inches wide by 38 inches long. In between those two extremes, there are seven other models with six different bed sizes ranging from 62 inches wide to 70 inches wide. So, no matter which Jeep Grand Cherokee you choose, you're sure to find the perfect bed size for your needs.