Please measure using our guide to assure an accurate fit. Contact us if you have sizing questions. Measure at line 2 on our diagram.
12 Prong fits 10 1/2" to 19"
Micro Prong collars were designed originally to fit small dogs, because the larger prongs on standard size collars were too far apart, causing both fit and effectiveness issues. A Micro collar is made up of miniature prongs with a much shorter distance between them than typical prong collars.