Disposable masks come in different sizes, but in most cases they are uniform. The size of the mask is/kloc-0 17.5mmx9.5mm Disposable masks can also be divided into disposable double-layer masks, disposable non-woven mask masks and disposable triple-layer masks.
At the same time, disposable masks cannot be reused and need to be replaced every 6-8 hours. And before use, carefully check whether the mask of the mask is intact. If it is damaged, it can't be used again, otherwise it will not only have no protective effect, but also cause other adverse effects.
In short, it is best to choose a mask for children according to their age. The best size is about 8- 10 cm. If the size of the mask can be adjusted, it is best to cover the child's nose, mouth and chin. The size of the mask should not be too big or too small, otherwise it will not play a good protective role.