The 10.5-inch Galaxy Tab S measures 9.7 inches long by 7 inches wide. The 8.4-inch GTS measures 8.4 inches long and 4.9 inches wide. Both models are the same paper-thin quarter-of-an-inch thick. That's thinner than the iPad Air. The 8.4-inch unit weighs just 10.4 oz. A textured back panel is not particularly grippy, but is warm and comfortable to the touch. A pair of dimples hide attaching points for genuine Samsung Galaxy Tab S accessories.