A Great Practice Aid For Your Putting Stroke. 9' X 3' Kidney Shaped Green Gives You 3 Cups To Aim At. High Quality Putting Surface Designed To Stay Smooth. Hone your putting skills with this fun 3-by-9-foot putting green. The kidney-shaped green's three cups give you plenty of practice targets, while the built-in sand traps are designed to catch missed shots. The green also offers a high-quality putting surface designed to stay smooth over time.