Measuring your dog's neck for a collar is a simple process that you can do with a measuring tape. Follow these steps:

1. Use a flexible measuring tape. You can also use a piece of string or ribbon and then measure it with a ruler.

2. Place the tape around your dog's neck where the collar would normally sit. Make sure the tape is snug but not too tight. You should be able to fit two fingers between the tape and your dog's neck.

3. Read the measurement where the tape overlaps. This measurement will be the size of your dog's neck and the size of the collar you should purchase.

4. If you are unsure between two sizes, it's always better to go up a size rather than down. A collar that is too small can be uncomfortable or even harmful to your dog, while a collar that is too big can slip off and be lost.

5. Be sure to check the sizing chart below to order the correct size - add your dog's neck measurement at checkout for a perfect fit!