SpotOn comes in three sizes to fit most dogs fifteen pounds or more and with neck sizes between 10” and 26”. It’s important to measure your dog’s neck size prior to ordering. 


Measure your dog’s neck just above where his regular collar sits. Make sure you can fit one or two fingers between the measuring tape and your dog’s neck.


Selecting the right size is important! It ensures your collar’s antenna will face the sky and receive the strongest GPS signal, making the entire system more accurate.


1. Measure your dog’s neck just above their regular collar.


2. Make sure you can fit two fingers under the measuring tape.


3. Select correct size (Small, Medium, or Large).


You’ll know you have ordered the right size, when the collar fits snuggly and the antenna sits on the back of your dog’s neck. This ensures the best possible GPS connectionーthe more sky the antenna sees, the more satellites it can connect to, the more precise your boundary lines will be! 


If your dog is a puppy, we recommend waiting to purchase until she’s about six months old (or when you have a good idea of her adult size).


If you have any questions, we’re here to help. You can reach us at Support@SpotOnFence.com  or Monday - Friday 9 am-5 pm (eastern time) at 1.603.488.1504.