Please note this collar is for 16mm only. 
 
Our Collars are made with the perfect material for adventurous pups that like to get dirty! It is an easy clean collar that is able to withstand a lot of wear. These low maintenance collars are waterproof, scent-proof and rot-proof. 
 
Size Chart (in inches):
Extra Small - 9 to 13
Small - 13 to 17
Medium - 17 to 21 
Large - 21 to 25
Extra Large - 25 to 30
 
These collars are very durable but not indestructible so please always check your products for wear and tear as it is your responsibility as a pet owner to ensure they are always in appropriate condition.