I wire wrapped a natural freshwater pearl onto chain. Each stone is unique in color and size, so each necklace will vary slightly from the picture. Gemstones are approximately 8-10mm. Chain is 18". Necklace comes on a jewelry card with the name of the month and stone. Choose between 16", 18", or 24" chain. Please note our 16" and 18" chains are a cable chain, as pictured in product photos. The 24" chain comes in a slightly different style - a satellite chain.