Although I'm not a licensed/qualified physician, I am medically trained and credentialed at an advanced level and have been so for nearly two decades (oh my!, how old must I be

), so, with that being said... I can relate my own personal/professional experience here...often, the choice of ET Tube (ETT) size is either:
1. based on a "standard" 6.5-7ish for average females and 7.5-8ish for average males; or
2. based on an estimate of the trachea's diameter from the size of the fifth (pinky) finger.
In an emergency situation, there is no time for a look-see at the glottis/trachea/vocal cords to get an ETT size estimate, however, humbly, if it were me and the choice was possible damage to my delicately altered vocal cords or asphyxia, hypoxia, and other really nasty things...I'd happily run the risk of damaging my cords.
However, on a lighter note, it is very reasonable and prudent to confer with your surgeon and, perhaps more importantly, your anesthesiologist prior to any procedure to make them aware of your markedly narrowed glottic opening/vocal cord shortening. I can assure you that they would be MOST appreciative of the advanced information so they can take steps to limit their exposure to liability by utilizing an inappropriately sized tube.
Please don't interpret this as medical advice, merely a recommendation from a caring soul who has performed many endotracheal intubations.
As a sidebar, Jessie told me by email yesterday that two months is the magic time. Yeson (via Jessie) doesn't want you to undergo any procedure requiring endotracheal intubation for the two months prior to and the two months following your VFS...Me personally, I think I'd be inclined to wait a bit longer afterwards...but that's just my OCD kicking in lol ...see my question and her reply below:
"My question is how long after VFS am I able to undergo surgery with endotracheal intubation? There are several additional procedures I would like to undergo, but I want to make sure the timing is appropriate."
[Jessie's Reply] "The usual healing period is total 2 months so after this period it is okay to take any surgery. To make it safe, please inform
Dr.Kim of this during your consultation regarding the surgery procedure and etc."
-A