Good design: easy and convenient to use, help you avoid unsanitary hair contamination, lightweight and breathable for comfortable wearSize: the nylon net itself does not stretch, hold the two buckles, then straightened, the length of measurement is about 19.68 inches (Manual knotting may have an error of 1-3 cmIndividual package: individual package is good for using and storage, and can be applied for many times, convenient to take and wearQuality hair nets: nylon elastic lace with hand-tying, light weight, strong, durable; Great for stewardess, nurse, bank clerk, hotel clerk, dancers or skaters and so on, which make their hair will stay in place while performingPackage includes: come with 50 pieces hair nets and 40 pieces U shaped pins, large quantity to meet your needs, and you will always have a backup hairnet