This one is fairly large: SturdiBag Extra Large Flexible Height Pet Carrier. https://smile.amazon.com/dp/B0027P0Q2S
They used to have a XXL size that was a little taller but I don’t see that one right now.
For a kitten, you can use a smaller one. Our smaller grown Maine Coon also likes a more standard carrier, basically a boxy soft sided one that’s the largest size you can take with you on the plane
Oh yeah. But it ain’t cheap. Best carrier I ever bought though:
​
When I called AA about our regional flight (Bombardier CRJ 700- Arizona to Billings MT) he told us carrier dimensions for that flight can't exceed "8 in x12 in x16 in" which is smaller than our bag. I got that carrier suggestion from someone else in this sub who recently traveled with their dog on AA just fine, but don't know if they had the same regional requirements.
Leave the carrier out. We’ve always made it a the car carrier is just for transporting, particularly if it’s only one person available. Doesn’t just mean they’re going to the vet. Usually means they’re going to petco or something lol. They’ll happily get in and settle and watch curiously as I get ready.
We currently use this but we’ve used this when they were younger. The winner of their mini brawls was the one who got to be in the bag. The second one was a lot more fun for them to play in/around though (but it’s a lot smaller).