This necklace is made with a guitar pick that I can only describe as a 1980s style The Great Wave off Kanagawa image. I also used a rolled yellow cord. The necklace is 18 inches around and extends to 20 inches. If you need it to extend further let me know and I can add more of an extender chain to it. I can also shorten the cord. If you want to know what size would be best for you, take a piece of thread and put it around your neck at the length you would want your necklace. Then measure the thread. I used a lobster claw clasp as a closure, but if you prefer a barrel or toggle clasp let me know and I will change it. I can also change the cord if you prefer a different color, or suede. Suede is available in limited colors. All of my jewelry and accessories are handmade by me (Bethany) or Jennifer. Made in and shipped from Lubbock, TX. USA