Size of FIOS box in basement?

I'm getting FIOS installed soon.   We have telephone poles in my neighborhhood.  The current Comcast line comes into the basement & into the main splitter.    I'm trying to find out the size of the FIOS box that the fiber goes into with the coaxial output so I can figure out where it can fit.  I don't know if they're all one standard size.   thanks