How do you stipulate you wanted a small wedding so you invited only sixty five guests?

Below the RSVP say" Invititations are for the addressees only. No additional guests ,please."

65 guests are a good number. Enough variety to have a fun party, but still logistically manageable.You DO NOT owe anybody any explanations, so if anyone is rude enough to inquire , just say that's the way you and your new spouse wanted it. Just family, close friends, and the wedding party.If they press you, just excuse yourself, and say there is something you need to check on right away.