When I cosplay Near I wear a white tang top with the binding around it then, a white short sleeved shirt (with no colar because he has one under his shirt) and then the button up shirt.
For the pants I used a work pants from a place like Honda, Scotts and such.
They are really thick and not at all see through because of the work that they are used for. I got mine at a Salvation army for under $10. Plus they are usually men sizes and make them baggy.
Thats how a medium/small fits on me.
I wish you good luck!
Prince Rasler Heios Nabradia - Final Fantasy XII
Urd- Ah My Goddess
"Do not go where the path may lead, go insted where there is no path and leave a trail."
~Ralph Waldo Emerson~