This 12-piece necklace cord set is ideal for jewelry creators and fashion enthusiasts. Crafted from high-quality polyester, this set combines exceptional durability with all-day comfort, while maintaining its sophisticated black color and texture, resisting fading, stretching, or fraying. Each cord features an innovative double-sliding knot system, easily adjusting the length from 14 to 26 inches to accommodate a variety of neck sizes and style preferences. The secure knot mechanism ensures it stays in your chosen position during daily activities, preventing accidental slippage or loosening. This comprehensive 12-piece set offers excellent value for jewelry makers, DIY crafters, and gift-givers who need reliable accessories for multiple projects, daily wear, or creating coordinated looks for special events and group occasions. The versatile design is perfect for creating customized necklaces with statement pendants, crystals, charms, amulets, beads, and other decorative elements to showcase your personal style. Its minimalist black aesthetic is equally suitable for both men's and women's jewelry, complementing any fashion preference. The universal 14-26 inch adjustable length range fits nearly all neck sizes from teens to adults, while the standard 2mm thickness provides optimal strength without being bulky