I am looking to change the small app icons (19x19) I think that sit under the dashboard on the left side and change them into bigger icons. Every time I attempt the dimension stay the same and it cuts off my new icon.png image. Any help?

Would this be in application.php?

I meant application.tpl.php - in the themes folder?

its on page.tpl.php

Do you know where in the doc? I looked all over with a line of code with the same dimensions as the icon.png files, and find nothing

each module has his own icon, for example: forums
/modules/forums/icon.png