Editing TT scale (section)

== Gauges ==
According to NEM [[Normen Europäischer Modellbahnen]] standards, 1:120 scale trains should use the following gauges:

{| class="wikitable"
! Name || Kind of track || Model gauge || Real-world gauge || Can be used for
|-
| TT || [[Standard gauge]] || 12{{0|,0}}&nbsp;mm || 1435&nbsp;mm || from 1250&nbsp;mm to {{0| <}} 1700&nbsp;mm
|-
| TTm || [[Meter gauge]] || {{0}}9{{0|,0}}&nbsp;mm || 1000&nbsp;mm || from {{0}}850&nbsp;mm to < 1250&nbsp;mm
|-
| TTe || [[Narrow gauge]] || {{0}}6,5&nbsp;mm || {{0}}750&nbsp;mm, 760&nbsp;mm and 800&nbsp;mm || from {{0}}650&nbsp;mm to < {{0}}850&nbsp;mm
|-
| TTi (TTf) || [[Field railway]] || {{0}}4,5&nbsp;mm || {{0}}500&nbsp;mm and 600&nbsp;mm || from {{0}}400&nbsp;mm to < {{0}}650&nbsp;mm
|}

In New Zealand TTm is known as [[NZ120]],<ref>{{cite web|url=http://www.nz120.org/|title=NZ120 - home of NZ120 model standard|accessdate=23 July 2022}}</ref> and is growing in popularity as a means of modelling the nation's {{RailGauge|3ft6in}} gauge [[Rail transport in New Zealand|railway network]]. In Japan TTm is also used to represent {{RailGauge|3ft6in}} gauge railways under the name "TT-9", and has had limited commercial support from manufacturers such as [[Tenshodo]].<ref>{{cite web |title=天賞堂 [31011] (TT9)C61形蒸気機関車 九州型 (TT-9ゲージ[1:120スケール 9mmゲージ] 動力なし) |url=https://models-store.tenshodo.co.jp/products/10084976?variant=42709065629859 |access-date=7 April 2024}}</ref>

Several scales also use TT gauge but with a larger scale to represent narrow gauge railways. The most common are [[HOn3½ gauge]] (which represents 1067{{nbsp}}mm gauge in 1/87 HO scale) and [[H0m gauge]] (representing metre gauge track also for 1/87 HO scale).