Collers keep coming off

I dont know if this is in the right section, but Im having coller issues with my cats. I put them on their necks,make sure they are tight but not too tight so they can breath,and they end up taking them off somehow.

How can I keep them on them? Is there a certain coller thats better then others? I was using one of those breakaway ones incase they every got caught on something i didnt want them choking, but maybe I should use a normal one?

Im moving soon, so i want to make sure they all have collers and tags incase they get out of the house somehow.

Any suggestions?
Thanks

My Sarah did this as well with her collar, that is until, I ordered from Dr Foster & Dr Smith. I ordered their nylon collar (breakaway) but seems stronger than the other collars that she used to wear.

http://www.drsfostersmith.com/produc...fm?pcatid=1827

I also ordered their namplate for the collar http://www.drsfostersmith.com/Produc...&N=2002+113520

She hated the noise from regular id tags! But now with her new collar & plate, she hasn't tried once to take off her collar.

Maybe this would work for your cat?