According to the specifications, sanitary napkins can be divided into three categories:
The length (L) of class 1 (commonly known as large) is: 270mm, 280mm, 290mm, 300mm; Width (B) is: 70mm, 80mm, each piece quality (G) 11.0g, suitable for female menstrual night use.
The length of class 2 (commonly known as medium) is 210mm, 220mm, 230mm, the width is 60mm, 70mm, 80mm, the quality of each piece is 7.3g, suitable for female menstrual daytime use.
The length of the 3 classes (commonly known as trumpet) are: 170mm, 180mm, 190mm. The width is: 60mm, 70mm, each piece quality is 3.0g or 5.5g, suitable for women before and after menstruation and during the day.