Is it ok to give a 4 month old baby a 6 month plus pacifier?

From the time my son was 1 month old he preferred the 6 month + pacifier. He wouldn't take the smaller ones. It is what your baby prefers basically. It won't screw up your babies teeth, most paci's these days are "ortho-safe" which means they protect growing teeth. I can't personally vouche for that, since my son still doesn't have teeth...