1:32 scale is a traditional scale for models and miniatures, in which one unit (such as an inch or a centimeter) on the model represents 32 units on the actual object.
It was the scale of some of the earliest plastic model car kits.
It is a common scale for aircraft models and for figure modeling, where it is called 54 mm scale, from the height of the human figure.
1:32 was used for equipment to match 54 mm toy soldiers for miniature wargaming and was common in scale military modeling such as tanks and armored cars until it was largely replaced by 1:35 scale.
[1] A standard for tabletop rail-racing in the mid-1950s, it was adopted by the original slot car manufacturers, Victory Industries and Scalextric.