These dog collars come in different sizes to the size to fit them good.
- Small- 9.5-13 1/2 inch wide
- Small/Medium - 12-15.5 1/2 inch wide
- Medium - 12.5-16 3/4 inch wide
- Large- 14.5-18 3/4 inch wide
- XL - 16.5- 20 1 inch wide
- XXL - 18.5- 22 1 inch wide
- XXL- 20.5-24 1 inch wide
Pull the tape snug but not tight. If you do not have a tape measure, you can use a piece of string and then measure the string with a rigid ruler. Allow sufficient room to slip two fingers between the collar and the dog's neck. Or you can measure his neck and add two inches.