For two-month-old babies, they can wear diapers of size S or M. However, diapers that are too big may affect the baby’s movement, and diapers that are too small can not absorb enough urine, which will lead to leakage and back leakage, etc. Because babies have delicate skin, they need to choose the right type of diapers to avoid damage to the local skin. Diaper models are divided into S, M, L and XL sizes. According to the weight and development of the two-month-old baby, it is generally possible to use the small size, i.e. S size, but some babies grow too fat and can choose M size. Diapers between S or M size should be chosen according to the baby’s thigh circumference. Parents need to choose soft and comfortable diapers that do not contain irritating ingredients to avoid skin allergies. Parents also need to change diapers for two-month-old babies diligently to prevent long-term contact between stuffy diapers and babies’ skin, which can lead to skin allergies.