PCB Size of Arduino Single-Sided Serial Board ?

i'm making the Version - 3 of built by hand arduino serial board and want to know the size of the PCB in inches or anything please help?

LINK to the Board - http://arduino.cc/en/Main/ArduinoBoardSerialSingleSided3

About 3.6 by 2.6 inches. There's a comparison image:

Thank you!, i will be taking the size mentioned by you as definite.