Drawing needs to be in black and white. Each sheet should include a top margin of at least 2.5 cm (1 inch), a left-side margin of at least 2.5 cm (1 inch), a right-side margin of at least 1.5 cm (5/8 inch), and a bottom margin of at least 1 cm (3/8 inch) from the corners and edges, thereby leaving a sight (the usable surface) no greater than 17.6 cm by 24.4 cm (6 15/16 by 9 5/8 inches).