I bought this one when I flew to pick her up as a kitten. It was the largest I could find that fit the Sourhwest guidelines. Worked well.

Sherpa Original Deluxe Pet... https://www.amazon.com/dp/B00DME94TO?ref=yo_pop_ma_swf

She probably wouldn't fit in it very well now.

I bought this one for vet/groomer visits.

PetLuv Soothing "Happy Cat"... https://www.amazon.com/dp/B01AO0YGKU?ref=yo_pop_ma_swf

It is huge, and my Khaleesi loves it. She often sleeps on top of it. She is about 11.5 lbs. She also has this weird obsession with mesh, and she cant destroy the mesh on this one.