Do you have any ideal what is the best dimension for a Website banner? Please advise if you have any idea. Thanks
Personally, I try to keep the width at 800px max. The height should look in proportion and there is a percentage many people use. I think it's 4:3
you want to design your header to keep in mind that you want most of your important information above the fold... it can be as big or as small as you like... just make sure you display all the pertinent information.
A good size for me is 800 x 120 or 850 x 190 (Although I prefer the latter). It makes it nice and big and I can easily resize it a bit smaller to fit my needs.
i thought universal was 468x60 - but I myself use a lot of 720x90 header leader boad sized ads. Helps on CTR.