On all flights and tickets, you can take on board one hand luggage measuring 56 x 36 x 23 cm. However, it can only weigh 5 kg.
One checked bag weighing up to 20 kg is also free of charge. Exceeding the weight is punishable by a fee of 80 baht / 2 eur per kilogram on domestic flights and from 7 to 15 usd on international flights.