Usage Tips:Versatile Use: This set of race bibs is great for various sporting events such as school sports day, field competitions, marathons, basketball games and more. It's suitable for adults, making it a good choice for athletes.Complete Set: The package includes 100 individual number bibs, along with 200 pins for easy attachment.Quality Material: These Competitor Numbers are made of Polyester pongee, reusable and designed to withstand the rerquirment of sporting event.Ideal Size: With a size of 15*20cm, these running numbers bibs are large enough to be easily visible while being too convenient and comfortable for the athlete wearing them.Easy to use: Each running bib comes with 2 pins, ensures that the large numbers running bibs stay securely in place throughout the sports, providing a good experience for the participants. Specification: Material: Polyester pongee Size Chart: 15 cm x 20cm / 5.91 inch x 7.87 inch Package Includes: 100 Race Bibs with 200 Pins Note: Please allow slightly errors 1-2cm differences due to manual measurement.