The Acetate Collar Necklace is the perfect piece for your everyday jewelry! Dress it up and dress it down for a comfortable accessory. Designed by So Vang, the Acetate Collar Necklace can be adjusted up to 30 inches long with Exclusive Adjustable Necklace Sliding Clasp. All materials are included except tools. Includes step-by-step instructions. Tools needed: two pairs of flat or chain nose pliers.