When buying pants, the length of underwear is an important size to determine the appropriate length of pants. Usually, the length of underwear will change according to different body types to adapt to people of different body types. The inner length of jeans has the meaning of size, and is generally marked in inches.

For example, W3 1 and L32 represent waist circumference of 3 1 inch and inner length of 32 inches, that is, waist circumference of 78 cm and inner length of 8 1 cm. This size can help consumers choose the right pants.