Order Tips : When you are measuring your dogs neck , please measure his neck near the top portion and be sure to press down through all its fur to get an accurate measurement. Many friends don't press down the fur to get a correct measurement ,leading that they order a size that is too large . The measured neck size of your pet must be within the adjustable length of the collar. For example, if your dog's neck is 13 inches long, please order an Small (10 inches -15 inches) adjustable collar. Please check your custom information carefully before you pay ! Especially your pet name and phone number !