How big pet travel airline should I take 60 pounds for a pointer / lab mix, and a border collie?

I'm torn between the large (24W 35L 26T) or extra large. Thank you for your advise and feedback if any. that will be traveling for seven hours (plane) Thanks. will a nonstop flight.

Larges I would go with them. You do not want an extra large if you have too much space in them if they move too much during the flight. Sure they can stand and turn around to lie down. Make sure it is a nonstop flight on it or a short stop there. I made a big German Shepherd vessel, female last year in an extra large. I was thinking of putting it into a giant. There was a guy who was going to Canada last year, so the only way I could getting there was a giant, and the cost has to be too at this point also the search for the aircraft that could handle a big box.

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