How do you know when to draw the line with invites?

It's usually recommended to invite in circles. If you're going to invite one cousin, you should invite them all. The same for children. It's perfectly fine to invite your niece, but not your coworker's 2 year old that you've never met. It's not fine to invite your sister's child, but not your brother's.

I have one cousin that I'm really close with. She has 5 brothers and sisters. All 6 of them have 3 or more kids. I'm only inviting that one. That would be about 30 people. Plus I don't really talk to the other ones. But I wouldn't invite some kids and not the others. I think it's all or none unless they are in the wedding party. My wedding will be kid free

We invited all immediate cousins, and FH invited some second cousins because he’s close with them. I think it depends on who you are close with and also to think about inviting in circles. For children, if cousin A gets to bring their kids, cousin B should get to as well. On the other hand, just because friend A gets to bring kids doesn’t mean friend B should, it kind of depends on the ages of kids and how close you are too

I invited all the cousins that I was close to - or went to their weddings in the past. I didn’t invite some cousins within the same family. My one Aunt has 7x kids (my age), 4x of which I never speak too. I only invited the 3x that I talk to. I’m not having many kids, 2x in my wedding party, if OOT guests needs to bring them they will be allowed, & my godson & his brother. People may be upset, but it is what it is - I was trying to appease everyone, but I was getting loss.

We invited some cousins but not all. I probably have 20 first cousins and actually talk to 3. So no we didn't do all cousins, why would we?

My fiance and I decided that we wanted to write a note about a nice memory we have about each guest. If we can't think of one they were cut from the invite list. We also invited a lot of aunts and uncles but not their kids (our cousins) just because the family would be mad if we didn't invite the aunts but doesn't seem to mind if didn't invite all of their five each kids.