Clothes really do come back in style every 20 years

The math checks out, so hang on to those jeans. The trend's reliability may be waning as styles continue to diversify, however. Breakthroughs, discoveries, and DIY tips sent six days a week. Clothing trends come and go, but in some cases, they don't stay away for too long. For decades, both the fashion industry and its devotees have referenced the so-called "20-year-rule," which suggests society is liable to see certain styles return at semiregular intervals.