1, Jeans: Jeans are one of the most common pants with marks under the trouser legs. Usually there is a small sign under the trouser leg of jeans, which may be printed with brand trademark, logo or brand name.

2. Pants/formal pants: Some pants or formal pants also have signs under their legs. These signs are trademarks or signs of the brand, which reflect the advanced texture of the brand on formal occasions.

3. These signs and labels provide important information about the pants under the trouser legs, and help consumers to choose suitable pants.