What are your favorite brand of keyboard switches for fidget clickers?

I’ve been looking at and wanting to print some fidget clickers, but would like to know if anyone has some preferred switch brands before I purchase some.

Bonus question, is there a standard size for keyboard switches, and I can reasonably expect any brand of them to fit into most models I find? Or will I need to do some minor resizing for any of them I print?

Thanks!