25 Loose graph sheets, graph size (measuring 268mm x 190mm),printed red grid lines on both sides of the sheet, 3 perforated holes, 2280 squares on premium A4 paper (measuring 280mmx 200mm). This graph can be used in Math (geometry, algebra); Science (Physics, Chemistry, Biology) reports writing; Pre-engineering and technical drawing; Architecture drawing; Art design; drafting; planning; calligraphy and more.