All British OO and HO models from Europe and North America run on this gauge of track, hence the track is descibed as being for OO and HO gauges.
British OO gauge models are produced to a scale of 1/76, or 4mm to 1 foot. When adding scenery, vehicles and people watch out for models and kits scaled at 1/76 (eg Oxford and EFE cars, trucks and buses) and 1/72 scale (commonly used for aircraft and military models) which are close enough in size to be useful to complete model scenery.
Sectional track is supplied in fixed units with moulded sleeper base and joiners pre-installed, simply clip together to create a layout or extend a train set oval.
Peco Steamline is supplied as 1-yard lengths of flexible track, allowing railway-like sweeping curves to be created, complemented with a range of larger radius points for more realistic trackwork.
Please note that printed backscenes now have a section within scenic materials.