Formati papira i tvrdoće grafitnih olovaka

Formati papira (u milimetrima)

	A	B	C
0	1188 × 840	1400× 1000	1296 × 917
1	840 × 594	1000 × 700	917 × 648
2	594 × 420	700 × 500	648 × 458
3	420 × 297	500 × 350	458 × 324
4	297 × 210	350 × 250	324 × 229
5	210 × 148	250 × 175	229 × 162
6	148 × 105	175 × 125	162 × 114
7	74 x 105	88 x 125	81 x 114
8	52 x 74	62 x 88	57 x 81
9	37 x 52	44 x 62	40 x 57
10	26 x 37	31 x 44	28 x 40

Tvrdoće grafitnih olovaka (8B-6H)