I handmade this beautiful and stunning necklace, and it is artisan made. Beach goers will love it. Perfect for a gift. It is made with glass and metal. It is approximately 21 1/2”. (The  measurements are also in the photos.) The pendant does not open, but the contents inside can be shook around. There are beads and crystals inside, and there is a metal starfish and seashell in it. Thank you for looking at my listing.