The proper name for this necklace is a dog collar. The name isn't so nice but the does accurately describe where the dog's collar sits on the dog's neck. Queen Elizabeth's grandmother, Queen Alexandra made these necklaces popular, and she was an elegant woman. 7/8" tall at the center, 5/8" on the band, 12" plus 3 1/4" extender. The hook closure is a replacement, and may have had the maker's name. Other than the hook, the rest is rhodium plated and all of the rhinestones are prong set and sparkly.