When shopping for web hosting, the primary stats you are going to be looking at are storage space and bandwidth. Storage is simply how many megabytes worth of files you can store on your host, and bandwidth is the monthly amount of megabytes you can transfer back and forth to users, as they browse and use your site.

For storage, you can build your site on your local hard drive and see how many megs it takes up. You can also estimate by knowing what you're site is going to be used for: primarily text and some small images, or large files such as audio and video?

For bandwidth, you need to estimate how big each web page is, how many pages the average visitor will visit, how many daily visitors you will get, and multiply it all by 31 for a month's worth of bandwidth.

Each site will vary tremendously, but for a rough idea, the typical small personal or business site will generally not use more than 1 GB (1000 megs) in a month's time.

Most shared hosting plans will easily accomodate this.