The Size Info. you can refer :
SIZE neck girth:9.7''-12.6'', chest girth:13.7''-16'' ;
Please measure the size of your pet before buying and choose the correct size for purchase.
Leave 1 finger room will make your cat feel more comfortable with this new harness.

Details:
1、Neck Girth: 9.7''-12.6'', Chest Girth: 13.7‘'- 16''
2、1050D nylon material
3、4 Quick-Release Buckles and 4 adjustable straps
4、Rubber handle
5、Sturdy Metal Leash Ring
6、Get 2 FREE embroidered patches

How to make cats wear cat harness?

First of all, you need to make the cat not resist the leash, let the cat smell the leash, then as long as the cat shows interest, reward it with a snack.
Please remember that it takes a certain amount of time for cats to be used to wearing a leash. This time is different for different cats. Some cats may not be affected by the leash, but some cats need several hours or even days to adapt to the existence of leash.
If the cat is panicking and trying to break free, you can temporarily release it. From the beginning, the cat is used to wearing it for a few minutes, and through the reward method, slowly increase the wearing time.
In the end, if you put the leash aside, the cat will walk around the leash normally and even stay next to the leash, which shows that it is completely used to it.