Best Friend Matching Necklaces Set, Two Piece Necklace Set for BFFs, Matching Necklace Set for Her, Best Friend Gift. Our Yin-Yang Necklaces are the perfect gift to match with your bestie, significant other or wear them together!! Wear alone, or layer up this necklace with other chains to make a statement piece! This yin and yang necklace set aligns perfectly together 😍 Each Yin and Yang Pendant come with their own necklace. (This listing is for two necklaces: one yin and one yang). These matching couples necklace / BFF necklace set is made by Holly H., from Tumbled Shop with Sterling Silver plated stainless steel chain and hangs about 16" long, (don't worry it's ajustable).