Optimum curling ice dimensions. Lounge behind glass. Back boards six feet long. Six feet between backboard and hacks. Six feet between hacks and back line. Six feet between back line and tee line. 21 feet between tee line and nearest hog line. 72 feet between hog lines. Scoreboard at opposite end of lounge. Distance between hacks should be 136 feet. Distance between backboards should be 150 feet. Minimum width should be 14 feet, 2 inches. Centre line runs down the middle of sheet from hack to hack. Centre of each circle of the house intersects the tee line and centre line. Outside circle has a 12 foot diameter. Second from outside circle has a 8 foot diameter. Third from outside circle has a 4 foot diameter. Button is situated in the inner-most circle.