One of the best examples of how little has changed on the Z Fold 8 Ultra are its size and weight. At 8.9mm thick when closed and 7.58 ounces, its thinness and weight are exactly the same as before. That said, Samsung managed to shave off a tiny bit of material (and I do mean tiny) off the inside of the phone. When it's open flat, it measures 4.1mm instead of 4.2mm like on the Z Fold 7. Technically, that makes the Z Fold 8 Ultra the thinnest foldable Samsung has ever made.