This Thor’s hammer pendant is a replica of a find from around the year 1000, discovered in När on the island of Gotland. The original, made of silver and of the same size, is now located at the Fornsalen museum in Visby.
See: https://samlingar.shm.se/object/508187A8-E4A4-457A-82F7-DB300C78939D
Made of sterling silver 925.
All pendants come with a black cord that you can adjust to your desired length