Material: 10K Gold. Size: Approx. 2mm / 2.5mm / 3.5mm / 4.5mm / 5.5mm / 7.5mm / 8.5mm / 9.5mm chain width x 7" ~ 9" or 16" ~ 26". Type: Gold Chain Necklace or Bracelet. 3.5mm: 8"(1.4g) / 16"(2.7g) / 18"(3.0g) / 20" (3.4g) / 22"(3.7g) / 24"(4.0g) / 26"(4.3g) / 28"(4.6g) / 30"(4.9g).