Baggage exceeding in size, the sum of the 3 dimensions (length + breadth + height) in excess of 45 inches or 115 centimeters, cannot be treated as hand baggage and will have to be checked in.

Air India allows the following baggage allowances on all International sectors except USA/CANADA
First Class                                 40 Kilos
Executive Class                         30 Kilos
Economy Class                          20 Kilos
Infants not entitled to a seat       10 Kilos

Air India allows the following baggage allowances on all Domestic sectors.
First Class                                  40 Kilos
Executive Class                          40 KIlos 
Economy Class                           30 Kilos
Infants not entitled to a seat        10 Kilos                           

The maximum weight permissible for a single piece of baggage is 32 kgs. This rule is applicable on the entire Air India network.

Checked Baggage allowance for USA/CANADA:
Free Baggage allowance for USA/CANADA is as follows:

First Class and Executive Class:

• Free Baggage Allowance: 2 pieces.
  
• The sum of the 3 dimensions (length + breadth + height) must not exceed 62 inches or 158 
  centimeters for each piece.
  
• The maximum weight permissible for a single piece of baggage is 32 kgs or 70 pounds.

Economy Class:                                      

• Free Baggage Allowance: 2 pieces
  
• The sum of the 3 dimensions (length + breadth + height) of both must not exceed 107 inches. Moreover the linear dimension of each piece should not exced 62 inches.
  
• The weight of each bag must not exceed 50 pounds or 23 Kilos.

Infants in all classes:

• Free Baggage Allowance: 1 piece
  
• The sum of the 3 dimensions (length + breadth + height) must not exceed 45 inches or 115  
  centimeters.
  
• In addition they are entitled to 1 collapsible stroller/carrycot/infant car seat.

Please Note:
The following items will be considered as part of your checked in baggage allowance and must not exceed 62 inches or 158 centimeters - sleeping bag or bedroll/rucksack/knapsack/back-pack/fishing kit/sporting arms/snow-skis/water skis/golfing kit/fishing kit/wheelchair or assistive devices that the passenger is dependant upon.

Infants are allowed 10 Kilos checked in baggage but are not entitled to a seat. One checked or carried collapsible stroller or carrycot or bassinet or car seat for infant can be carried in the passenger cabin subject to availability of space.

Child fares are entitled to the same baggage allowance as adults.

Incapacitated passengers may carry one wheelchair or other assistive devices.