Light up soda menu letter measurements needed

[pinballdude]

Does anyone have a lightup menu that uses letters printed on clear plastic?
I need the measurement of the plastic the letter is printed on.
The slot that accepts the letters is about 1 1/2 inches but the letters "bowed out"
so I was wondering how much more length is needed to make them "bow".
Don't know if 1/4 inch is enough.
I have 2 signs and want the sign shop to make some menu items to put on it.
Thanks
Terry

[MoonDawg]

       I have a non-lightup menu board with 2 1/2" slots and use 3" letters.

       Why not cut pieces of cardboard to size and see what fits best?

       I used my computer to print a full page of the words needed on
the menu, then had the sheet laminated at the copy store and I cut
into strips to fit.
       Here is a picture through the window

[dr galaga]

Or you could put them on overhead transparencies and cut them to the size that you want.  You can buy the ones that you can run through a laser printer, or you could have your local copy shop run them through a copier from your ink jet copy.