USPS PS110 10-Pound Calculating Postal Scale Calculating postal scale determines postage for items between 0 and 10 pounds 5.5-by-5-inch platform features fold-up top for weighing oversized pieces Calculates postage for most popular USPS domestic and international shipping methods Tare function resets "zero" weight so you can easily weigh loose items 9-key membrane keypad; measures 5.5 x 2.25 x 7.75 inches (W x H x D); 1-year warranty