Description Features: The measuring ruler is light weight, wear-resistant, and high hardness. The ruler corrects the height of the net according to the international table tennis federation general height 15.25cm. The 4mm fold helps judges measure the thickness of the colloidal sheet. The ruler can also help to draw the hand position line when patting the rubber. Perfectly for home practice, school tournaments, or club, effortlessly adapts to any table tennis playing surfaced. Specifications: Component: Plastic Size: about 20cm/7.87 Package Includes: 1 Pc Table Tennis Umpire Ruler note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.