Amazon.com: EFYTAL Friendship Necklace, Sterling Silver... Feb 27, 2019 · Meaning: This 2 circle best friend necklace is the perfect way to celebrate the special bond between girlfriends. Looking for best friend birthday gifts for women? Look no further! This silver necklace makes the perfect bestie gifts for women. Length, Measurements, Materials: This best friend gift is made of 925 Sterling Silver and measures 19".