Would just like to hear from people who are 100% sure they are done having kids and have done something permanent like a vasectomy to prevent having anymore and how did you know you were done?

I currently have 3 children, growing up I wanted 2, a boy and a girl but my first 2 were boys so I always knew I'd try "one last time" for a girl and my 3rd baby is a girl, so having both genders I thought I'd feel "done" but I don't. I feel like 3 kids is more than enough and most days I'm quite happy with 3 but at the same time I don't want to do something permanent.

I just wondered also if others who are done felt the same? Thanks for reading!