HTTP POST data size

My data usage is strangly high. Does anyone remember roughly how much data your post request cost you? An example query and a rough figure of usage would help a lot. Thanks!
[180 byte] By [geminizina] at [2007-11-27 8:21:01]
# 1
i m not sure but well it might support upto 1028 bytes.cheers
vikaspatela at 2007-7-12 20:09:26 > top of Java-index,Java Mobility Forums,Java ME Technologies...
# 2
I am running a simple POST request, eg.$_POST['firstname'] = 'Michael'$_POST['lastname'] = 'Jordan'And the response I get back from the server is the player's date of birth. Now why would this simple query cost me 9.8KBs of data usage?
geminizina at 2007-7-12 20:09:26 > top of Java-index,Java Mobility Forums,Java ME Technologies...