These signs are safety way guidance system (SWGS). They are means of escape where the way leads to the safe conditions and alternative means of escape from most difficult situations.
Size
D 01 - D 05 = 150 * 150 mm / 200 * 200 mm
D 06 - D 23 = 100 * 300 mm / 150 * 400 mm
D 24 - D 27 = 300 * 100 mm / 400 * 150 mm
D 28 - D 39 = 100 * 300 mm / 150 * 400 mm

These signs are safety way guidance system (SWGS).
They are means of escape where the way leads to the safe conditions and alternative means of escape from most difficult situations.
Size
D 40 - D 67 = 100 * 300 mm / 150 *400 mm
D 68 - D 70 = 100 * 400 mm / 300 * 600 mm
D 71 - D 74 = 200 * 400 mm / 300 *600 mm

These signs are safety way guidance system (SWGS).
They are means of escape where the way leads to the safe conditions and alternative means of escape from most difficult situations.
Size
D 75 - D 114 = 100 * 300 mm / 150 * 400 mm