Please do NOT measure your dog’s current collar. It will not result in a correct fit!
Here’s the best way for perfect fit for your collar.
Take the circumference of your pet's neck directly on him at the ideal location for the collar to be positioned. Take a soft measuring tape. Place two fingers under the tape and get the measurement in inches. If you don’t have a soft measuring tape you can use a piece of string or rope and mark the spot where it meets, then place it alongside a hard ruler. The collar will not be adjustable check the measurement if it seems adequate. The measurement should not come off your pet or be too tight.
Ajustable Biothane adapter
Measure the circumference of your pet's neck at the natural positioning of the collar. Follow the same steps as the buckle clip.
If Your Dog's Neck Measures...