kimg, the size of the quilting frame really depends on how long the rollers are. Frames are almost always adaptable to whatever size roller you want. A fairly standard roller length is 10 feet, although they can go up to 14 feet for people who want to do oversize king quilts. If you want to do only small items, you can make or purchase shorter rollers. On some frames it is easy to swap out the roller sizes to go bigger or smaller. Here is a link to Hinterberg's frame for domestic sewing machines (harp size up to 11 inches):
http://www.hinterberg.com/prod-Origi...g_Frame-5.aspx
Rollers are expensive to ship, so usually you buy a frame and then purchase metal rods at a big box hardware store cut to the length you want.
For quilting small items on a frame, I would even use basting spray. You don't *have* to use basting spray, but it's an option. Here's a Youtube video on how to do that:
http://www.youtube.com/watch?v=tw3Lq...ure=plpp_video
There are tabletop frames too, including one where you can buy the kit parts and assemble it yourself. There is also someone who sells directions for making a machine quilting frame and sells the carriage assemblies and parts (you need a different size carriage assembly for machines with bigger harps) on eBay. Lots of options.
Really, though, for small items I find it's easy to FMQ them on my domestic machine because they fit under the arm easily. You don't really need a frame setup for small items. I purchased mine because I *hate* trying to FMQ larger quilts on my domestic machine. It's more fun for me to move the machine than the quilt!
Edit: If you want links to the kit and to the eBay seller of directions and parts, I can look them up for you.