One of the issues I have with most paracord bracelets is that though they look nice, you often make them using small lengths of cut cord that are hard to take apart and hard to reassemble on the spot.
Instead of the fancier wraps, this one uses an old slip braid I learned years ago in Boy Scouts. It took me less than 5 minutes to make this bracelet, and the 7" bracelet holds about 10 feet of easily accessible paracord. It unwraps quickly and can be reassembled quickly. It appears that it takes roughly (not exact but close enough) 6" of paracord to make 1" of braid.
If you wanted to make a 3 braid belt like this, you would be wearing over 50 ft of easily accessible cordage.
Step 1: Quick Video Tutorial
The video pretty much explains it all