Pacifier size

🌻🌺Trinkster🌺🌻 • Mamma to my little man 10/02/18 and little girl 11/29/19

My 10 month old uses MAM. Right now he has the 6 month plus ones. I accidentally bought the 16 month ones a while ago but haven’t used them yet. Would it be a problem if he used them? If I don’t have to go out and buy a few more that would be wonderful. I lose them so quickly!