1Bright Conspicuous Colors: With 15 round markers in 5 different bright colors green, blue, yellow, orange and red, each color have 3pcs marker. The spot marker set is exactly designed for optimal visibility. They are very easy to recognize during games, exercises training or sport activities. 2Entertainment: These sport marker could keep kids entertained for hours, and improve their creativity and cognitive abilites at the same time. 3Applications: These number carpet spot markers perfectly suitable for sports, school training playground, classroom, and other party activities. 4Reusable: The carpet marker with 1 to 15 number is reusable. 23cm / 9.1in diameter, suitable size, suitable for indoor and outdoor sports activities. 5Safe Round Spot Markers: Made of premium pvc material, very thick, sturdy and safe for kids using. The edge of spot marker is round and will not nd damage the carpet when moved.