Description: Quality material: Crafted from quality synthetic rubber, these distance golf balls are designed for durability and wear resistance, ensuring long time performance and reliability on the courseDouble layer construction: Featuring a double layer design, these golf practice balls offer exceptional stability, low drag, and enhanced long distance performance, making them ideal for both practice sessions and competitive playEasy to use: The golf training balls come with a convenient storage box measuring 19 x 14 x 5 cm, making them easy to store, carry, and use wherever you goNice size: Each standard golf ball has a diameter of 4.27 cm. Their compact structure and lightweight design make them a great practical gift for golf enthusiasts among your family and friendsVersatile application: Equipped with putting lines, these golf accessories are nice for putting practice as well as various golfing scenarios such as training sessions or competitions Specification: Material: Synthetic Rubber Size Chart: Each Ball Diameter: 4.267cm/1.68inchBox Size:19cmx14cmx5cm/7.48inchx5.51inchx1.97inch Package Includes: 12 Golf Balls Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.