Usually, if the weight is within the normal range of the baby, M size diapers can usually be used from 3 months to 9 months.
Diaper size has NB, S, M, L, XL, XXL six kinds of size, NB for the newborn number, suitable for the birth of 0 ~ 5 kg babies to use.S for small size, suitable for 5 ~ 8 kg.M for medium size, suitable for 6 ~ 11 kg babies and children.L for the large size, suitable for 10 ~ 14 kg babies and children.XL, XXL for the enlarged size, suitable for more than 13 kg babies and children.
So M size diapers can be used for how long, and the baby’s weight is related to the M size diapers for 6 to 11 kg, generally 3 months to 9 months of the baby can be used, if the baby’s weight reaches 11 kilograms or more, it is generally recommended to change from the M size to the L size diapers.