Original class chart from the Kyaido of the Calibration and School. A class chart that everyone has in the publishing industry. Class charts are used to measure the size of letters and placement of letters on the paper. Editors and designers can not be missed as one of the seven calibration tools. The number chart of "by a calibrator, by a calibrator, for a calibrator" was all thought by the staff of the Jinaido and turned it into one piece. We invite you to utilize a variety of twists that are not found in the existing class chart. ---- Ruled / Numbers / Letter Samples / Tooth Table / Point Table (DTP) / Tooth Scale ----