These signs are used in combination of different measures like Fire Equipment, Prohibition and Safety.
Size
C 01 - C 04 = 250 * 200 mm / 375 * 250 mm
C 05 - C 13 = 250 * 300 mm / 300 * 400 mm
C 14 - C 15 = 100 * 300 mm / 150 * 400 mm
C 16 - C 18 = 250 * 500 mm
C 19 = 300 * 400 mm
C 20 & C 25 = 200 * 200 mm / 400 * 400 mm
C21 - C 24 = 300 * 100 mm / 400 *150 mm
C 26 = as per requirement.

These signs are used in combination of different measures like Fire Equipment, Prohibition and Safety.
Size
C 27 - C 41 = 250 * 300 mm / 400 * 300 mm
C 42 = 600 * 300 mm / 800 * 400 mm
C 43 = 900 * 300 mm / 1200 * 400 mm
C 44 - C 45 = 1200 * 300 mm / 1600 * 400 mm