Thalenoi - from the Thai Web Site, but this is for International flights. I
think the allowance is less for internal, unless it is a connecting flight.
BAGGAGE ALLOWANCE AND DEPARTURE INFORMATION
Weight Concept
The weight concept is applied to all areas except for travels/connections to/from USA, its Territories, and Canada.
Royal First Class : 40 kgs (88 lbs.)
Royal Executive Class : 30 kgs (66 lbs.)
Economy Class : 20 kgs (44 lbs.)
Piece Concept
The piece concept is applied to all travels/connections to/from USA, its territories, and Canada.
Royal First Class /Royal Executive Class : Two pieces of checked baggage; the sum of the three dimensions shall not exceed 158 cms (62 inches) for each bag. The maximum weight per piece shall be not more than 32 kgs (70 lbs).
Economy Class : Two pieces of checked baggage ; the sum of the three dimensions shall not exceed 158 cms (62 inches) for each bag provided that the overall dimensions of such two pieces shall not exceed 273 cms (107 inches). The maximum weight per piece shall not be more than 32 kgs (70 lbs)
Carry on Items
In addition to the checked baggage allowance, each passenger except infant under 2 years of age not occupying seat may carry, without additional charges, one hand baggage, provided that such carry on baggage shall have a maximum length 56 cm (22 inches), width 45 cm (18 inches), depth 25 cm (10 inches), and the sum of the three dimensions not exceeding 115 cm (45 inches). These dimensions include wheels, handles, and side pockets. The overall weight of the carry on baggage must not exceed 7 kg (15 lb).
The passengers are required to place their own carry on items in the closed overhead rack or under the seat by themselves.
In addition to the carry on item as above, following items are also allowed to be carried into the cabin without additional charges :
1/ small handbag/pocket/purse provided that it has a maximum length 37.5 cm (15 inches), width 25 cm (10 inches), depth 12.5 cm (5 inches), or the sum of the three dimensions not exceeding 75 cm (30 inches), and the overall weight not exceeding 1.5 kg. (3.3 lb). Such item includes computer notebook.
2/ crutches used by elderly passenger, sick passenger, and incapacitated passenger
3/ small camera or small binoculars
4/ infant food to be used during the trip
Spot check may be performed against the test unit and/or weighing machine at the check-in counter and/or at the boarding gate to ensure that these regulations are complied.