Shahada Necklace 18K Gold PlatedAdjustable hook: Yes ( Black is not adjustable)Chain Length: 12” with 4 “ of extension.Pendant Size: 0.8 inch (20MM)Our Shahada necklaces made in a delicate and elegant fashion for the perfect accessory to bring something meaningful to your collection. Coated in real 18-Karat gold, this piece does not sacrifice quality for style. Available in Gold , rose gold ,silver and blackThis Jewelry is very fine built with no sharp edges. Lifetime warranty!Please feel free to contact us if you have any questions.