Klein Friesland is a European map for Farming Simulator 25, ported from FS22 and rebuilt from the ground up for the new game. It is inspired by the Friesland region in the north of the Netherlands and reflects its typical dairy farming character, though an arable farm is included as well. The terrain is mostly flat, so you can start your own farm on any field or open area. The map measures 1x1 km and requires no new savegame for updates.

The map offers 50 farmlands and 40 fields, along with several farm sites: a starter farm with cows, a second dairy farm, an arable farm, a contractor yard, and a small farmyard with a farmhouse and shed. Further facilities include a BGA biogas plant, several productions, two placeable areas, a sheep pasture, and a warehouse where pallets can be bought at a discount. Buying Farmland 60 (which is free) also grants the previously "unbuyable" strips between fields and around certain productions, allowing you to merge fields into larger units. All fences and gates on the map are removable and belong to FarmID 1.

Notable gameplay features include a soil map for Precision Farming with tractors prepared with crop sensors, zero grazing for cows (they can be fed grass while still producing at 100%), stubble destruction for grain crops, and spring wheat and barley as additional crops. Water can be taken from the canals and two smaller ponds, but not from the ditches separating the fields. There are no collectibles to find.

Version 1.0.1.0 added missing paintable textures and gave the Vehicle Store and Animal Dealer their own map icons. The mod is 292 MB in size and available for PC/MAC, PS5, and Xbox Series X|S.