Reliable Material Selection: These running bib holders are made of quality ABS plastic materials, which are stable, durable, and portable, without adding extra burden or affecting your athletic performance. No Need to Punch Holes: You can use these race bib clips to securely fasten numbers to your shirt or jacket without damaging your clothes, providing convenience and protection. Practical and Easy to Use: Featuring a button design, this race bib holder allows quick and accurate attachment of the bib to sportswear, easy to put on and remove, stays secure during activity, and can be reused multiple times. Suitable for Various Sports: Ideal for events requiring race numbers, these clips are suitable for skiing, skating, track and field, cycling, climbing, running, dancing, and more. Compact and Safe Design: Each marathon bib clip measures approximately 1.7 cm (0.67 in) in diameter, lightweight and small in size for easy storage and portability; smooth edges with no sharp points, ensuring safe and reliable use. Color: Mixed Colors Material: Plastic Package Contents: 40 x Number Buckle Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement allowance is +/- 1-3 cm.