What are the best size of zipties for cable management?

If you want to know the case I have it's the zalman z11+. But I really wanted to up my cable management and all the sizes of zip ties confused me.

Velcro fasteners? If you swap out parts a lot something thin and easy to snip off.

I'm looking for sizes of zipties, not velcro, that probably wont fit in my case.

The best zip ties for cable management are the ones that are 1mm wide and 30 mm long.

Thank you

I use various sizes. Sometimes you only need to tie down a fan cable, sometimes a whole bunch including the 24-pin.
Extra length really isn't an issue, you can just cut that off.