This photo shows the relative sizes of the display digit options:
These are left-to-right a 3-inch, 2.25-inch, and 1-inch digit. Depending on
your monitor and resolution, they may be close to actual size.
Even the 1-inch digits can be seen from across a room, although the larger
digits are definitely easier to read.
Many pinball machines use the 1-inch size digits.
See the ordering page to compare pricing between the various options.
(2.25-inch digits may not be there yet, but they will be available
as an option in the near future.)