Originally Posted by
purplezoe
The only pop up window I can find just shows the seating (when clicking on the flight number. The aircraft type is in light script below the flight number, but there is no pop up for it.
Oh- there is another one, but it is the "JAL shell flat seat", which opens up into information about the seat (which does not seem to include information about seat width though).
Then you just have to believe in what I told you
I usually just use the Japanese version of the site. Some functions (like this one) is not available in the English version. I don't think you will find the width on JAL product page.