• ★ALL SIZES:Small Diameter 2.5 mm and length 14 inch, Medium Diameter 3.0 mm and length 16 inch, Large Diameter 3.5 mm and length 18 inch, X-Large Diameter 4.0 mm and length 20 inch. Please contact us to ask for a help if you don't know the exact size.
• ★Safe and Harmless: This choke collar for dogs are smooth and rounded to ensure that no harm comes to your pet; there is no sharp ends on the prongs. Soft rubber caps provides extra comforts.
• ★Strong And Reliable:It's necessary to use PLIERS when you need to add some links, you can't take it apart easily, either your pet dog. Be the pack leader with this safe and effective training collar.
• ★No Pulling While Walking or Travel: No need to scream at a dog or punish it.You only have to pull the training collar and the dog will stop immediately. The training collar is great for training aggressive dogs.