Baggage Policy on Air Transat
Hand luggage
Each passenger can travel with one carry-on bag on board of the aircraft. This bag must not exceed the dimensions of 9 x 15.75 x 20 inches (23 x 40 x 51 cm) and must fit in the overhead compartment. You may also bring one personal bag with a maximum size of 4.7 x 11.8 x 16.9 inches (12 x 30 x 43 cm), which can be, for example, a handbag / laptop / camera. This bag must be placed under the seat in front of you.
Checked baggage
Checked baggage included in the ticket price must not exceed a weight limit of 50.7 pounds (23 kg) and maximum total dimensions (width + lenght + height) of 62.2 inches (158 cm).

Air Transat