Is your sister one of your best friends? Then check this out. This is an interlocking 2 piece design where both pieces fit together. They both have a personalized name engraved on each side with the word TWIN interlocking the two pieces together. This is a very special and unique design we made for twins. You may personalize it by adding engraved names to each side. We made our Interlocking designs because we wanted to create something that unites two people. Two 20" thin chains will be sent with this order. However, if you would like different sizes offered below please message us immediately after ordering. We offer various chain sizes from: 18" thin 20" thin 24" thin 20" thick 24" thick Key Chain Adj Black Cord