mera baby 4 month 3 days ka hai usko M wala diaper mangao ya s size wala mere ko samajh nahin a raha hai pls answer

A. I think small would be better also I would like to tell you you should know the weight of your child because every packet of diaper would have this referral range of weight suppose it says from 4 kg to 8 kg is going to be small size according to that weight of your child you can buy