The national standard has large (L), medium (M) and small (S) specifications for children's masks. Large size is recommended for children over 10 years old, medium size is suitable for children 6-9 years old, and small size is suitable for children 3-6 years old. For infants and young children 36 months and younger, because wearing a mask will increase breathing resistance and feel uncomfortable, we generally do not recommend wearing a mask. You can strengthen protection by reducing going out.
Of course, due to individual differences among children, it is most appropriate for parents to choose a mask that fits the size of the child's face.
