So I have a dilemma..FH's family is HUGE and my family is not quite as large. I would really love to invite the children of my cousins (who are travelling from out of state so their children kind of have to come anyways - 5 kids or so not including those in the wedding). On FH's side, there is no possible way that they can invite all the cousin's kids unless they are willing to cut down and invite only family they are close to, including their children.
ETA: His parents do not want kids at the wedding so that they can invite all of their extended family. My mother and I would prefer to cut guests so that I can include children. Both our families are paying so they all get a say.
ETA#2: I am not concerned with even numbers on each side. Only concerned with keeping guest count within our limits.
How do I explain this to his family? They don't really believe in wedding etiquette rules so I think they will just say "invite your cousins kids we don't care".