The posts shall be 1.55 metres (5 feet 1 inch) in height from the surface of the court. They shall be sufficiently firm to keep the net strained as provided in Law 3,and shall be placed on the side boundary lines of the court. Where this is not practicable, some method must be employed for indicating the position of the side boundary line where it passes under the net, e.g., by use of a thin post or strips of material, not less than 40mm (1 1/2 inches) in width, fixed to the side boundary line and rising vertically to the net cord. Where this is in use on a court marked for doubles it shall be placed on the side boundary line of the doubles court irrespective of whether singles or doubles are being played.
The net shall be made of fine natural cord of artificial fibre of a dark colour and even thickness and not less than 15mm (5/8 inch) and not more than 20mm (3/4 inch) mesh. It shall be firmly stretched from post to post, and shall be 760mm (2 feet 6 inches) in depth. The top of the net shall be 1.524 metres (5 feet) in height from the floor at the centre, and 1.55 metres (5 feet 1 inch) at the posts, and shall be edged with a 75mm (3 inches) white tape doubled and supported by a cord or cable run through the tape and strained over and flush with the top of the posts.