Reliable Material Selection: These running bib holders are made of quality ABS plastic materials, which are stable and durable to use, and portable, without bringing extra burden and affecting your athletic performance. Without Punching Holes: You can use these race bib clips to securely fasten the numbers to your shirt or jacket without damaging the fabric, eliminating the need to worry about these fasteners harming your clothes, bringing convenience to your experience. Practical and Convenient to Apply: Featuring a button design, this race bib holder helps you quickly and accurately fix the bib on sportswear, is easy to wear and remove, not easy to fall off, and can be reused multiple times. Applicable for Many Sports: When you need to attach a race number, these race number clips are highly useful, suitable for skiing, skating, track and field, cycling, climbing, running, dancing, and more. Compact and Safe: Each marathon bib clip measures approximately 1.7 cm (0.67 in) in diameter, with a small size and lightweight design, making them easy to store and carry without taking up much space. Additionally, they have no sharp edges, ensuring reliable and safe use. Color: Mixed Color Material: Plastic Package Contents: 40 x Number Buckle Note: Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allows an error of +/- 1-3 cm.