The line in the center of a soccer field is the center line.
its 9 inches
I believe you are on about the center spot, but this may not be the official name.
The diameter of the center circle on a regular soccer field (100x60 yards) is 20 yards.
I'm not sure what you are asking here, but at the centre of a soccer field is a centre or half way line and a circle with a 9.15m (10 yard) radius.For more details, check out - http://en.wikipedia.org/wiki/Image:Football_pitch_metric.svg
The lines that mark a soccer field are touch lines, goal lines, the halfway line, the center circle, corner arcs, goal area lines, penalty area lines, and penalty arcs.
Whenever the ball exits the field across a touch line.
They Line up behind the center in there positions
As of the 2007 season: Left Field Foul Line - 335 ft Left-Center - 380 ft Center Field - 401 ft Right-Center - 390 ft Right Field Foul Line - 330 ft
The circumference of the center circle of a soccer field is pi times its diameter (which is 10 yards). It could also be expressed as 2 times pi times its radius (which is 5 yards). It's about 31.416 yards.