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	Minimum
	Fifteen inch	381 mm	(15 in)

	Narrow
	600 mm	600 mm	(1 ft 11+5⁄8 in)
	Two foot	610 mm	(2 ft)
	Two foot three inch	686 mm	(2 ft 3 in)
	750 mm	750 mm	(2 ft 5+1⁄2 in)
	Bosnian gauge	760 mm	(2 ft 5+15⁄16 in)
	Two foot six inch	762 mm	(2 ft 6 in)
	Swedish three foot	891 mm	(2 ft 11+3⁄32 in)
	900 mm	900 mm	(2 ft 11+7⁄16 in)
	Three foot	914 mm	(3 ft)
	Italian metre	950 mm	(3 ft1+13⁄32 in)
	Metre	1,000 mm	(3 ft 3+3⁄8 in)
	Three foot six inch	1,067 mm	(3 ft 6 in)
	Four foot	1,219 mm	(4 ft)
	Four foot six inch	1,372 mm	(4 ft 6 in)
	1432 mm	1,432 mm	(4 ft 8+3⁄8 in)

	Standard	1,435 mm	(4 ft 8+1⁄2 in)

	Broad
	Italian broad gauge	1,445 mm	(4 ft 8+7⁄8 in)
	Dresden gauge	1,450 mm	(4 ft 9+3⁄32 in)
	Leipzig gauge	1,458 mm	(4 ft 9+13⁄32 in)
	Toronto gauge	1,495 mm	(4 ft 10+7⁄8 in)
	1520 mm	1,520 mm	(4 ft 11+27⁄32 in)
	Five foot	1,524 mm	(5 ft)
	Pennsylvania gauge	1,581 mm	(5 ft 2+1⁄4 in)
	Pennsylvania gauge	1,588 mm	(5 ft 2+1⁄2 in)
	Five foot three inch	1,600 mm	(5 ft 3 in)
	Baltimore gauge	1,638 mm	(5 ft 4+1⁄2 in)
	Iberian gauge	1,668 mm	(5 ft 5+21⁄32 in)
	Five foot six inch	1,676 mm	(5 ft 6 in)
	Six foot	1,829 mm	(6 ft)
	Brunel	2,140 mm	(7 ft 1⁄4 in)
	Breitspurbahn	3,000 mm	(9 ft 101⁄8 in)

World map, rail gauge by region

A BL 9.2-inch howitzer with shells lined up on the ground recently delivered from the trench railway in the foreground during World War I.

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.