The size of a portable laptop desk depends on what you plan to include in your workspace. A heavy-duty portable desk like the Lillipad Work Station can support two monitors, plus a desktop, keyboard, and other equipment, but it can weight 67 or 72 pounds, depending on which model you choose. Meanwhile, the LapGear Essential Lap Desk weighs less than a pound and is great for working on the go, on the couch, or in bed.