Screened Compost - Screen compost has gone through some sort of screening process to separate the fine particles from the larger pieces. This can be adjusted based on the size of the screen or the type of screen you are using. Coarse Compost- Coarse compost is general unscreen compost with larger pieces of wood in it. Fine Compost- Fine compost utilizes a small screen size to achieve the smallest particle size possible in your finished product. Generally, fine compost uses a ½ or 3/8 or ¼ inch screen size to get the smallest finished product.