Scale 1:76 || 1:80 || 1:87 || 00 H0
Scale H0 or 1:87 is globally the most popular scale. It has been introduced in Germany approx 1935 and derived from the track width of model trains, which explains the "odd" numbers. There are a few closely related scales in the market and these trains can run technically also on H0 tracks.
A big variety of models and structures from various companies is available and makes it easier to find a particular item than with any other scale. A first choice for hobbyists, who love details.