Knotted Wire Fence also called Fixed-Knot fence or field fence is produced

in a range of sizes to suit the intended application.
Heights range from 42" with 8 line (horizontal) wires to 96" with 20 line

wires.
The spacing of the line wires varies depending on the application.
Fence with the tighter 3" spacing at the bottom of the fence provides

"predator control." All but the smallest predators can't get in, and small

animals (i.e. fawns or lambs) can't get out.
The distance between the stay (vertical) wires varies from 3" to 6" to 9"

to 12".
The closer the stays the stronger the fence. Fence with a 6" stay spacing

is the most common, however 3" is suited to higher pressure or higher

security areas, whereas 12" can be used in low pressure areas.
The fence becomes fully "predator proof" with 3" spacing between the

horizontal line wires and 3" spacing between the vertical stay wires.
You should look for a fence that suits your budget, but keep in mind

changes in your future requirements. Remember you can put cattle behind a

deer fence, but not deer behind a cattle fence.