Seen many. Interviewed and trained with various sizes. Don't worry, the 'playboy' era of this type of job has thankfully long gone. Maybe pax still regard it as glamorous but it is not a word crew would use to describe it nowadays. Anyone who says your weight is an issue needs dragging into this century. Go for it, good luck, be yourself, don't worry about nerves, chat to the other people there as much as you can remembering that you are all as nervous as each other and all on a level playing field, just relay your desire to do the job and that you're not afraid of hard work. Good luck.