Fitting a cat collar?
It should be a safe and comfortable fit, you should be able to fit only 1 to 2 fingers (flat) between the collar and the neck. If you can fit more than this, the collar is too loose.
What age can you put a collar on a kitten?
The cats muscles in their necks need to have time to get stronger and grow. Most cat collars would not fit a kitten younger than 6 months anyway. Wait until your kitten’s old enough to have one we cater for older and younger cats, have a look at our Cat Collars