Problem with ADD TO CART button size

[mlemedia]

I recently made a new add to cart button, and for some reason the size of the button is very small. The size of the original file is 90 x 36 pixels, but for some reason it is being re-sized to 20 x 8 pixels. Does anyone have any input as to why it isn't showing correctly?

[kobra]

Can't see it

Where is your site?

[mlemedia]

Actually, I figured out what the problem was. I had attempted to make the the Quantity input box on the View Cart page smaller. I did this by changing INPUT in stylesheet.css to 20px wide. It's actually kind of a no brainer. Changing the input messed up the add to cart button and every other input field too. I guess I need to give the input field on my View Cart page a class that specifies the width at 20px. Any thoughts?