Buttons and Banners

What are the standard sizes for a banner?
Full Banner= 468 x 60 pixels
Full Banner (with navigation bar)= 392 x 72 pixels
Half Banner= 234 x 60 pixels
Vertical Banner= 120 x 240 pixels
Vertical Tower= 160 x 600 pixels

What are the standard sizes for a button?
Buttons can have different sizes.
120x90 and 120x60, while a square button is generally 125x125, and a micro button is 88x31.

Give the URL for 3 buttons and 3 banners as examples.
Banners:
http://www.heybannerbanner.com/portfolio.html
http://www.justgothere.com/
http://www.lajuett.com/sample-ad-banner-design.html

Buttons:
http://free-web-buttons.com/free-web-site-buttons.html
http://www.lincolnbeach.com/justbuttons_samples.asp
http://www.prodraw.net/button/buttons1.htm