Materials & size: Shiny ABS ,quarter size . Colour: 5 Assorted color ,each colour 20pcs ,pack of 100 . Bright color for easy visibility,help you mark out exactly where your ball lies. The mark is an ideal assistant for your golf games, very practical and convenient to mark the golf ball position. Keep the pack in your golf bag and don't worry about losing your ball marker and have plenty to lend to your golf buddies. They'll stay securely in place with the plastic tab and stay out of the way with a thin smooth plastic top.