Look at the age before buying pacifier
Some of the best pacifiers for babies have an age to it. Meaning that some pacifiers are designed for a certain age group. And, you should not buy a pacifier that isn’t designed for the age group that your baby is in.
Even, if this means that you should buy a pacifier every couple of months. You need to replace the pacifier anyway before it breaks and can harm the newborn. So, you can just as well buy the appropriate pacifier that are ideal for a certain age group.
You can find the appropriate age on the package of the pacifier. If you don’t find any information about the age, you can ask the sales person in the shop for assistance.