Personalized Dog Collar with Crystal Slider LettersAdd their name to the Personality Collars with these shining crystal block letters for a collar that puts their name in lights. XXS size accepts letters directly onto the 3/8" collar, up to 7 characters or charms. XS and SM collars have 3/8" straps that snap onto 1/2" collars for personalization: 7 characters on XS or 12 on SM. Add fun slider charms for extra personality!