★HSC pet carrier is TSA approved and can be placed under the seat in the cabin, it is mainly designed for ①JetBlue Airlines:17×12.5×8.5″②Spirit Airlines:18x14x9″③Frontier Airlines:18x14x8″, but also in compliance with ④Allegiant Airlines:19x16x9″⑤Southwest Airlines:18.5×13.5×9.5″⑥Air Canada:21.5×15.5×10.5″. We recommend you buy this carrier when you fly with the above-mentioned airlines. We have determined that the usage size of this cat carrier is approximately 16.5*12*12 inches while you were not opening the EXPANDABLE ROOM!（Please consult with the airline before use!）And your pet would get another more 8*12*8 inch room if you open the expanding part!
★If you let your pet enter/leave through the skylight or small door/window in front, this carrier will be sturdy and maintain a stable shape! That would be great! Please see our 1ST PICTURE ! Thank you very much!
★EXPANDABLE ROOM:Unlike the conventional pet carriers, this pink pet carrier bag can expand on one side, extending the space to allow your cat to lie down and stretch while on the travel. The expandable cat bag also creates a safe environment to avoid stress reactions. Side pocket is convenient for storing documents, snacks, toys, food, and other travel accessories.