The Tanita model 1230 carat scale has 100 carat capacity with 0.1 carat readability. It measures 6 inches by four and a half inches by one inch. A convenient space saver, the scale features a large easy-to-read five digit LCD display, auto-calibration with 20 gram calibration weight, and programmable auto power-off. The large transparent lid protects balance. Weights include carats, grams, pennyweights, and grain. See the Tanita model 1230 carat scale and more great tools at Stuller.com/tools.