One thing you need to establish first before buying a cat collar is whether your cat is an inside or an outside cat. It sounds like a silly question but it can be very helpful.
You see, when your cat is an insider who never gets out, you can almost buy any collar.
With outside cats there are many more obstacles where the collar can get stuck, leading to injury or death. Although this is a possibility, it is still a good idea to let him/her wear a collar so that they may warn off birds.
Just make sure when buying a collar that you go for one with a safety release. This feature ensures that the collar will release, fall off or break free if the cat gets stuck somewhere.
If your cat is an indoors, relaxed cat, any cat collar will do.