Didog Personalized Metallic PU Leather Dog Puppy Collars Necklace with Diamante Crystal Rhinestone Free Name & Charms We offer up to 5 letters and 1 charms for free or six letters without charm.Sample: Name is "Bella" + charm "heart" Leave your pet's name and the charms you want by "Customise Now" Option. Crystal name letters,charms and buclke. Perfect for toy pets and little pets such as Poodles,Shih Tzu,Chihuahua etc. XS: neck size for 8~10"(20-25cm);S:neck for 10-12"(25-30cm) M: neck size for 11-14"(28-36cm);L:neck for 13-16"(33-41cm)