Specification classification of sanitary napkins

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; The width (B) is: 70mm, 80mm, the mass of each tablet (G) 11.0g, suitable for women's menstrual night use.
The length of Class 2 (commonly known as medium) is: 210mm, 220mm, 230mm, width is: 60mm, 70mm, 80mm, and the mass of each piece is 7.3g, suitable for women's menstruation daytime use.
The lengths of Class 3 (commonly known as small) are: 170mm, 180mm, 190mm. The width is: 60mm, 70mm, each piece has a mass of 3.0g or 5.5g, suitable for women before, after menstruation and during the day.