The size of an average fiefdom varied significantly depending on the region, time period, and local conditions. Generally, a fiefdom, which was a piece of land granted to a vassal in exchange for loyalty and service to a lord, could range from a few hundred acres to several thousand acres.
In medieval Europe, a small fief might start at about 100 acres, while larger ones could extend to 5,000 acres or more. The most prosperous fiefs could even exceed this size, especially in fertile areas where agricultural output was high.
The specific size of a fiefdom also depended on factors like the population density of the region, the agricultural productivity of the land, and the military obligations of the vassal. In essence, while there’s no strict measurement for an average fiefdom, it’s safe to say that they varied widely to meet the needs of the feudal system and the resources of the land.