I ordered a medium size sherpa soft sided carrier. 17"L x11"w x10.5"h but they sent the large at 20"L x 11.75" w x 11.5"H. Has anyone flown with a carrier in cabin of this size and did it work out for you okay? I dont want to be turned away.
Hmmm... That's big. You get a little flexibility in size, because bags do crush down a lot (unless you ask the people at the counters - they can be RIDICULOUSLY unacommodating) but I don't think you'll get THAT much flexibility.