what are the dimensions i should use when making a centered site layout
thanks
This really depends on your site. You can have it as wide or as thin as you like. However, keep in mind your audience, and there will be some people with small monitors and resolutions. Here are some good dimensions to use:
800px wide: This is a standard, as the one of the most common resolutions for old monitors and computers is 800 x 600px. However, you may have trouble trying to fit all your content nicely into 800px of space. Few websites with a lot of content use this width.
960px wide: This is my personal favourite. It is interesting to note that 960 can be divided into 3, 12, 16, and 4 equally. This makes it extremely useful when laying out your site into columns and grids. It also makes it easy to design your site with 'balance' and 'form'. 960px also has plenty of space for laying out a whole variety of content beautifully, while still being viewable easily by those who have small monitors and resolutions.
1000px: Commonly used for forums. Not as readable as 960px in small monitors, but still good.
1100px wide: This is a width commonly used by "heavy content" websites. One example is Smashing Mag!
The above dimensions are just examples. You may choose any width that suits the purpose of your site and audience. Try to keep it atleast 800px wide, but not go over 1400px, for good reasons.
Hope that helps!

