Size:Basic size: Approx 7.7(3.03")x5cm(1.97"). Model Size: Approx 4.8cm(1.89")x3.9cm(1.54"). Contents:The set contains 1 base marker and 6pcs different designs. Set of 6 different designs are interchangeable, each has different patterns or other stickers, providing you multiple choices. Durable Material:The ballpoint marking tool markers are both made of plastic material quality, odorless and non-toxic, safe for your use and can last for a long time. Design:Clamp design: convenient to use with clamp design, easy to grip the ball and to draw straight and neat lines on the golf ball, aid in fixing the golf ball. Easy to use:Easy to align: just mark the front and back sides of this golf ball marking tool, useful for aligning your putter face perpendicular to the target line and identifying your ball.