User:Daphne Preston-Kendal/MRS&G/table

	1:450	1:220	2 mm / 1:148–1:160	3 mm / 1:101 1:120	3.5 mm / 1:87	4 mm / 1:76	7 mm / 1:43 1:48	1:22.5
Standard	T	Z	N	TT	HO (Proto:87)	OO (EM, P4)	O	G
3 ft 6 in/1 m					HOn3½/HOm
3 ft/1 m			Nn3	TTn3	HOn3	OOn3
2 ft 6 in					HOn30/HOe		On30/O16.5
2 ft/600 mm						OO9
Minimum					HOz		O9	Gn15