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Minimum
Fifteen inch
381 mm
(1 ft 3 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 ft 1 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)