1st/2nd century civilian clothing..

[Ironhand]

Roman Military Clothing I by Graham Sumner is the best source I have seen when it comes to military clothing in that time period.

This doesn't seem to be a bad link to get started, but not very informative, just gives you an image http://www.crystalinks.com/romeclothing.html

Heres a better one
http://www.roman-empire.net/links/links-costume.html