May be this will help you
click hereTrunks, suitcase and boxes having outside measurement of 100 cms. x 60 cms x 25 cms (length x breadth x height) will be allowed to be carried in the passenger compartments as personal luggage. If the trunks, suitcase, and boxes, which in outside measurement exceed any one of the dimension, such articles are required to be booked and carried in the brake van and not in the passengers' compartment . Maximum size of the trunks/suitcase than can be carried in the AC-3 tire and AC chair Car compartment is 55 cmsx45 cms x 22.5 cms.