The size is 100x100. All icons are for free and you don't need to give credit as long as you don't claim
that they were made by you.
(A line like "not by me" would be fine.)
Since I've got the most of them, all things Final Fantasy are on the left. Everything else is on the right.
Final Fantasy VII
Final Fantasy VIII
Final Fantasy X
Final Fantasy XIII
Kamikaze Kaitou Jeanne/ Phantom Thief Jeanne
background texture for the icon above by lookslikerain
Lord of the Rings
Samurai X/ Rurouni Kenshin
Heart Under Blade (Shinobi)
Yun-Harla.com - a homepage about Jaina Solo