In general, the categories of Panties and G-string are determined by the following three factors, the amount of rear coverage, the height of the waistband and the width on the sides. Now let us see those categories one by one together in the following parts.

First, it is briefs. Perhaps briefs can be the most traditional underwear. It has the full coverage in the rear and on the sides. But in modern times, there are few women like to choose such a kind, for they believe that this kind of lingerie has nothing to do with fashion and sexiness. But briefs are useful to those heavier or older ladies who care less about fashion. 

Next, let us talk about the thongs. The thong style of women underwear consists of a small triangle of fabric at the front with a crotch that extends to the back. Thongs eliminate panty lines by leaving bottoms mostly bare. 

Third, it is G-string, Then do you have learned about the skimpiest kind of sexy lingerie?  It is the G-string. This kind of lingerie has only a little of materials. What is more, it almost offers no coverage of the rear. Perhaps, there are few women are brave enough to wear such a kind of lingerie for her daily needs.