If you're interested in weaving paracord, you should check out fusion knots. Run by a Mr. J. D. Lenzen, the gallery features a huge list of amazing knots and weaves, all with links to very clear and easy to follow instructional videos.
A surprising number of these look like they would work well as belts. I tried the T-Virus Sinnet, and it came out quite well:
So I used the pattern for a belt:
It's much lighter and more flexible than the previous belts I've made, and it's quite quick to weave (though you do have to pay attention to the distance between the knots if you want good consistency). The belt is a little too narrow for a man though (plus it's too fancy for me), but I think it makes a good woman's belt. I think this one is just under 3 feet long, and took about 35 feet of dark blue paracord, and perhaps a little over 6 feet of light blue paracord. I'm wondering if it could be made wider using a more complex pattern in the centre than a spiral, or perhaps weaving a second row of knots along the outside (it should be possible but will be more time-consuming as the entire working cord would need to be pulled through the knot each time, rather than just a loop).