I remember back in the late 70's that we used a 5 milimetre spike for a tartan(rubber) surfaced track, longer for a gravel track, say 10 mil.
2 centimeters
Probably the 3/8 inch spike. I have found that to be common in high cross country running. IN track you probably only want to use a 1/8 inch spike.
The question is ambiguous: do you mean the length of the pins, or the size of the shoes? If you are asking about the length of the pins, there is not a single right answer, because it depends on the type of running you are doing (for example track sprint vs. cross-country), and the surface you are running on.
The recommended size for what??!
an Olympic size track has how may lines
A king size bed is recommended for a master bedroom.
A baby track, is a track that is much smaller then an average track (half the size)
Q: What is the recommended size for the boot file system? A: The /boot file system is recommended to be 50MB.
No. A spike buck can grow more points in subsequent seasons. Some hunters believe that a spike buck has a diminished potential rack size, and cull them for that reason, but it is possible for them to grow more points in subsequent seasons.
Yes some of them do. My YMCA track has an indoor track that is upstairs. It is not a full size track though.
About 1 1/2 inches
7.5 or 8 is recommended