For being such a small bit of fabric, the belt loop, also known as a carrier, seems pretty insignificant.  It isn't though, because how else can you guarantee that your belt is going to actually stay on the waistband?  So really the belt loop was pretty inventive and have become quite standard with a lot of ready-to-wear garments.  If you're interested in the process in how to create your own belt loops, look no further than this tutorial.  We show you each step so that your own will look just as nice as the store bought, or maybe even nicer.