These signs are for means of safety indication of safe measures.
Size
S 01 - S 9 = 150 * 150 mm / 200 * 200 mm
S 10, S 38 - S 45 = 250 * 200 mm / 375 * 250 mm
S 11 - S 23, S 30 - 37 = 100 * 300 mm / 150 * 400 mm
S 24 - S 29 = 100 * 400 m

These signs are for means of safety indication of safe measures.
Size
S 46 - S 61 =150 * 150 mm / 200 * 200 mm
S 62 - S 81 = 100 * 300 mm / 150 * 400 mm
S 82 - S 83 = 100 *400 mm / 150 * 400 mm
S 84 = 75 * 400 mm / 125 * 400 mm
S 85 - S 92 = 250 * 200 mm / 375 * 250 mm