For instance, if the height of a door 🚪 on a building is the width of my thumbnail, it is N scale, twice that is HO scale, and twice that is O scale. People, autos, and animals are scaled ...

Very nice layout. Like mine, mine, not finished in a lot of areas. Next we will be going by the station where there is an N Scale digital Signboard saying ‘Next Train 16:42’.