Originally Posted by
geminidreams
I used to be big (peaked at 140 kg now a svelt 88kg) but always selected an aisle seat and tried to lean aisle side as much as possible. I never had anyone complain.
That's how I handle it as a COS, and I don't buy BE fares so I make sure I'm in an aisle seat. On a last minute flight with window or aisle only I set up an expertflyer alert. Luckily with elite status I don't have to pay for a preferred aisle seat.
Southwest refunds the second seat if purchased in advance which is awesome.