Hotz ArtWorks has a line of felt fields for your terrain needs. Don’t just use boring felt, use pretty felt!
From them to you:
Felt Fields are airbrushed felt fields with silk screened flocked furrows. A single set of Felt Fields covers an area slightly larger than 20×14 inches in size. Felt Fields are designed to remain flat, especially when placed onto our felt game mats. Felt Field sets ship flat so they won’t wrinkle or crease, and they are inexpensive: $16 USD per set and $14 USD per each additional set purchased.
Each Felt Field Set contains six individual fields in four sizes: 4×4 inches (10x10cm); 7.5×6 inches (19x15cm); 11.75×6 inches (30×15.5cm); and 9.75x8inches (24.5x19cm), for a total area coverage of just over 20×14 inches (50x35cm). Each Felt Field Set comes in a mix of 4 different flocked colors: Earth Brown, Flax Yellow, Dark Green and Medium Green. The flocked fields have been treated so the flocking will not fall off with normal gaming use.
Felt Fields can be used for any time period. These are pre-made, ready to ship.