You might consider Googling....which I just did a bit of. I got to wondering, like ManiacQuilter2 asked, if a fire fighter could take personal bedding. It looks like they can, based on a few things I read. I also read that the size of the beds is determined by space and every fire house is different.
That being said....I think you couldn't go wrong with a twin sized quilt. Surely the beds are big enough for fire fighters....some of whom are not small guys. And the quilt wouldn't have to fit perfectly.
But, go Google and see what you find. I just Googled what I wanted to know...examples: What size beds are in fire stations? Can firemen take their own bedding to their fire station? I found several places where the firemen had asked their wives to make nice warm quilts for their beds at the station.
Hope this is helpful. I had fun looking and am just avoiding starting supper anyway.
Dina