Package Contents: You get 10 pieces of running bib clips in 2 colors, including black and white, 5 pieces of each color. Sufficient quantity meets your needs. Premium Material: Our bib fixing clips are made of high-quality plastic and magnetic material, small, stable, reliable, and not easy to break or fade. You can use them with confidence. Easy to Use: First, take out the magnetic buckle and separate it into two halves. Then, place the number plate and align it with the desired position on your clothing. Finally, connect the two halves of the magnetic buckle together to quickly and securely attach the race number without damaging the fabric. Product Size: The front diameter of the running bib clip measures approximately 17.5mm (0.69in), the back diameter is approximately 16mm (0.63in), and the magnet diameter is approximately 10mm (0.39in). Please note that this product is not suitable for children under 13 years of age. Wide Applications: These running bib clips are ideal for running, skiing, track and field, cycling, rock climbing, mountaineering, marathons, and other sports events requiring competition numbers. Color: Black & White Material: Plastic and Magnet Package Includes: 10 x Running Bib Clips (5 black, 5 white) Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.