Choosing the Right Size
LED Collars come in 3 sizes: S, M, L
Each size is adjustable to ensure a good fit.
To find the right size, measure the length of one of your dog's collars
OR
Measure the circumference of your dog's neck (where they'd normally wear a collar).

Then, choose your dog's size:
Small (S): 12.5" - 16"
Medium (M): 15.5" - 19"
Large (L): 19" - 23"
In between sizes? 15.5" > go with (M). 19" > go with (L)