Magic Metal Spikes Collar Bib Necklace Black Crystal Studs Gold Tone Choker NM29 Fashion Jewelry Ships from the USA Spikes Collar Necklace. Accented with black crystals. Spread of Spikes Measures 6.5 inches. Entire Length of Necklace, Open Laying Flat: 21 inches. Makes a perfect gift. Search Magic Metal Jewelry for more jewelry styles.