Package Contents: 10 running bib clips in 2 colors, black and white, 5 pieces of each color. Sufficient quantity to meet your needs. Premium Material: Made of high-quality plastic and magnetic material, these bib clips are small, stable, reliable, and resistant to breaking or fading. Designed for durable use. Easy to Use: Separate the magnetic buckle into two halves, place the number plate in position, then connect the two halves to securely fasten the bib to clothing. Provides a quick and secure hold without damaging fabric. Product Size: Front diameter: 17.5mm (0.69in), back diameter: 16mm (0.63in), magnet diameter: 10mm (0.39in). Note: This product is not suitable for children under 13 years of age. Wide Applications: Ideal for running, skiing, track and field, cycling, rock climbing, mountaineering, marathons, and other sports requiring race number attachment. Color: Black & White Material: Plastic + Magnet Package Contents: 10 running bib clips (5 black, 5 white) Note: Light reflection and different displays may cause slight color variation between the image and actual item. Measurement error allowed within +/- 1-3cm.