Hello Lindsey: we have a Schnauzer 18 pounds who we need to start taking on our trips to Orlando. But all of the places I read it's so confusing about the dimensions of the carrier. One or two inches can really make a difference. I don't want to get to the airport and find out that I won't be able to take him without the option of placing him with the luggage when I know I can have him under the seat. Please advise. Thanks.
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