Two foot and 600 mm gauge railways are narrow gauge railways with track gauges of 2 ft (610 mm) and 600 mm (1 ft 11+5⁄8 in), respectively. Railways with similar, less common track gauges, such as 1 ft 11+3⁄4 in (603 mm) and 1 ft 11+1⁄2 in (597 mm), are grouped with 2 ft and 600 mm gauge railways.