Editing OO gauge (section)

===Related scales===
*[[OO9]] – Used for modelling {{RailGauge|2ft}} narrow gauge railways in 4&nbsp;mm scale, often paired with OO scale layouts.
*[[OOn3]] – Used for ms in 4&nbsp;mm scale
*[[HO scale|HO]] – 3.5&nbsp;mm scale using the same {{RailGauge|16.5 mm}} gauge track as OO.
*EM – 4&nbsp;mm scale using {{RailGauge|18.2 mm}} track.
*P4 – A set of standards using {{RailGauge|18.83 mm}} gauge track (accurate scale standard gauge track).
*00-SF – Uses {{RailGauge|16.2 mm}} track with ordinary OO wheelsets. Allows the tighter trackwork tolerances of EM without the need to re-gauge wheels.